I’d like to share this remarkable two and a half-minute video of a horseshoe crab during the molting process. Produced by the Hong Kong Coast Watch and filmed by Kevin Laurie in May 2011, this film shows a juvenile Tachypleus tridentatus (one of the three species found in the Pacific ocean along the coast of Japan) shedding its outgrown exoskeleton at 16 times real speed. With calming music playing in the background you can witness the horseshoe crab as it burrows in the sand and exerts a tremendous amount of effort pulsing and pushing as it releases itself from its old shell. You can also get a glimpse as to the interesting creatures crawling around on the shores of the Pacific sea. For more information on the morphology differences between the four extant species of horseshoe crabs visit the Ecological Research & Development Group (ERDG), a leading resource for all things horseshoe crab related.
Don’t underestimate the utilities of algae
A reader recently asked where to find a field guide to seaweed of the northeast Atlantic and also wanted to know in particular “which species is edible, how to prepare it and what historical uses were of specific seaweeds”. I am going to do my best in answering and encourage you all to continually challenge me with questions. Please feel free to comment anywhere or simply email info@beachchairscientist.com.
It seems as though the most thorough resource with the most concise information online for Atlantic coast species would be from the Field Guide to Algae from Acadia National Park. A much more extensive online reference would be the AlgaeBase (The World of Algae was absorbed into this database) produced be the Irish Seaweed Research Group. And, of course, there seems to be a gaggle of print books out there as well which are always nice to have while beachcombing.
For the second part of the question I am going to take the time to elaborate on my previous post about edible seaweeds found in ice cream. Here are 10 utilities for algae that you may or may not know about. There are plenty more but I have to leave a little something for you to research with the resources I found (also there is a collection of recent news article below).
- In general many seaweeds can be used as your garden’s best friend. Check out this great article from Earth Easy on How to Use Seaweed to Mulch Your Garden.
- Algae can be used to make a biodiesel.
- Blue-green algae are used as a dietary protein, as well as in aiding weight loss, stress, fatigue, anxiety, depression, among many other others issues (check out the image of the gentleman drinking some below – yum?).
- Dulse (Rhodymenia palmata) is a favorite food of those living in Canada, the UK, and northern Europe.
- Irish moss (Chondrus crispus) is a food addictive and is the source of carrageenen which thickens and stabilizes foods, including ice cream and beer.
- Laminaria seaweeds (also known as Saccharina seaweeds) are thought to stimulate cleansing, reduces water retention, and tone thyroid action.
- Nori (Porphyra) is popular in Japanese cuisine and is known for its high nutrient value.
- Sargassum seaweeds are thought to disperse accumulated phlegm and water.
- Sea lettuces (Ulva) are enjoyed raw in salads and cooked in soups in Scandinavia, the UK, China, and Japan.
- Toothed wrack (Fucus serratus) is used as a bath soak in Ireland and is thought to help with arthritis.
If you or anyone you know swears by drinking algae as a supplement please share your experience below. I’d love to read your perspective!
Image (c) gotalgae.com
Related articles
- Eating algae (economist.com)
- Should people eat more seaweed? (bbc.co.uk)
- Would you brush your teeth with seaweed toothpaste? (itv.com)
- Little Green Algae Saves the Day (askmaryrd.com)
Oh, Christmas tree (worm)! Oh, Christmas tree (worm)!
What are Christmas tree worms and where did they get their name? I’m more than happy to let you know that it would not be a good idea to decorate your house with Spirobranchus giganteus.
The Christmas tree worm got its name because the spiral plumes that radiate from its main body resemble that of our fir and spruce trees that adorn our living rooms in December. These spiral plumes (also viewed as tentacles) are used for feeding and breathing. The Christmas tree worm prefer to feast on phytoplankton floating in the water nearby.
They do not move once they find a spot and nestle into burrows below the coral reefs they call home.
The tentacles sway in the water surrounding the burrow, but if a predator is lurking … the Christmas tree worm will hide completely.
Christmas tree worms live worldwide among warm, tropical reefs and can be orange, yellow, blue, or white. They typically do not exceed 1 1/2 inches in length.
Image (c) marine-bio.org.
What they’re into … with David Helvarg
This is a series I will be featuring each Tuesday this summer to get a special sneak peak at the different personalities behind the scientists, activists, and educators (including bloggers) who play an integral role in the marine science conservation field. It’s essentially an extension of the overwhelmingly popular and well done Tumblr blog, This Is What A Scientist Looks Like, (BCS was featured in April!) which sets out to illustrate that scientists are not just crazy haired nerds in lab coats. I’ve sent a list of 15 random questions to some folks I know and asked that each person share at least their answers to 5 of them. This first week we’re starting off with the one and only David Helvarg.
David is an author and Executive Director of Blue Frontier Campaign. has written: Blue Frontier, The War Against the Greens, 50 Ways to Save the Ocean, Rescue Warriors and Saved by the Sea. His next book, ‘The Golden Shore – California’s Love Affair with the Sea’ will be out in early 2013. He is editor of the Ocean and Coastal Conservation Guide and organizer of ‘Peter Benchley Ocean Awards’ and ‘Blue Vision’ Summits for ocean activists. He has worked as a war correspondent in Northern Ireland and Central America, covered a range of issues from military science to the AIDS epidemic, and reported from every continent including Antarctica. An award-winning journalist, he produced more than 40 broadcast documentaries for PBS, The Discovery Channel, and others. His print work has appeared in publications including The New York Times, LA Times, Smithsonian, Sierra, and Parade. He’s done radio work for Marketplace, AP radio, and Pacifica. He has led workshops for journalists in Poland, Turkey, Tunisia, Slovakia and Washington DC. David is a licensed Private Investigator, body-surfer and scuba diver.
Here are David’s answers to his chosen questions:
What is the last thing you bought that you shouldn’t have?
A 12-pack of Coke.
What is your favorite Sunday breakfast?
Huevos Rancheros, fresh OJ and the Sunday New York Times, ideally on a porch with friends and a water view.
Are you a night owl or a morning person?
Can’t say I really give a hoot but neither do I wake up with a smile on my face.
What is your favorite room in your home?
My home office – just a 10 second commute from the bedroom. If you work hard you get to play hard.
What is your favorite scent?
The iodine and slightly kelpy odor of a living sea.
What is your favorite sundae topping?
Anchovies. Only kidding. Chopped nuts, chocolate syrup, whipped cream, it’s all good.
What is your favorite pastime?
Globo Surf has allowed me to enjoy my favorite pastime which is Bodysurfing, diving, or snorkeling depending on conditions.
What three things would you take with you to an island?
Dive gear, my girlfriend and a boat.
How superstitious are you?
I believe in evolution and anthropogenic climate change so not very but I have given the occasional agnostic prayer for friends and loved ones in trouble.
What is your favorite day of the week?
Whatever day of the week I’m on a beach.
Are you a cat person, dog person, or neither?
Thought I was a dog person till I ended up in a 20-year relationship with a tabby named Poose, the finest small furry predator I’ve ever known or am likely to.
If you were a geometric shape, what would you like to be?
Elliptical.
Thanks to David for playing along and I hope you’re relaxing on the beach enjoying an ice cream sundae with plenty of chopped nuts, chocolate syrup, and whipped cream somewhere. To the dear rest of you, please keep an eye out for more to come from other amazing ocean conservationists this summer and please don’t forget to participate in the Summer Sustainability Creativity Challenge!
31 facts about Arctic whales
This past week offshore drilling in the Arctic was approved to get underway (it’s been 20 years since this previously happened). This is going to severely affect the quiet and serene home for whales and other marine animals in the area. Here are 31 facts about the beluga, narwal, and bowheads whales – species that exclusively call this area home.
Resources
3 Quarks Daily science prizes awarded
Since 2009, during the solstice and equinox of each year a prize for either science, philosophy, politics, and arts & literature is awarded by the esteemed judge brought in by the editors of the blog 3 Quarks Daily. This filter blog, created by founding editor S. Abbas Raza, is a “one-stop intellectual surfing experience by culling good stuff from all over and putting it in one place” and at the head of a Richard Dawkin’s list of bookmarks. Today the awards for the top 3 science pieces were announced. This year Judge Sean M. Carroll reviewed the over 100 nominees and found these thought-provoking and attractive blog posts to be top quarks.
1. The crayola-fication of the world: How we gave colors names, and it messed with our brains
2. In Soviet Union, Optimization Problem Solves You
3. Forget bipedalism. What about babyism?
Dr. Carroll focuses on theoretical physics and cosmology and blogs at Cosmic Variance. You may have also seem him on The Colbert Report and Through the Wormhole with Morgan Freeman.
The Beach Chair Scientist was nominated for the post An important call for more forage fish to remain in the sea.
What’s your favorite marine mascot?
We took our daughter to her first major league baseball game this weekend. I will never forget her cheery face when she’d point at the bright orange and black cartoon Orioles on fan’s shirts and say, “buuurrd?” The Phillies lost so it wasn’t the best experience we could have hoped for at Camden Yards, but overall my little family had an enjoyable time (also, impressive despite the 90 degree weather).
Needless to say, the day got me thinking about marine-themed mascots for major league sports in the U.S. This is a list of 9 marine mascots that might inspire your little marine biologists to follow baseball, hockey, or football or conversely that could get your little sports fan into science. I suppose if you’re a teacher, these mascots are also useful teaching tools to introduce different biological units (Ok, I am not certain what lesson you’d ever need Raymond the Seadog to introduce).
- T.D. the Dolphin (Miami Dolphins – NFL)
- Blitz the Seahawk (Seattle Seahawks – NFL)
- Lou Seal (San Francisco Giants – MLB)
- Iceburgh the Penguin (Pittsburgh Penguins – NHL)
- Fin the Whale (Vancouver Canucks – NHL)
- Raymond the Seadog (Tampa Bay Rays – MLB)
- Billy the Marlin (Miami Marlins – MLB)
- S.J. Sharkie (San Jose Sharks – NHL)
- Al the Octopus (Detroit Redwings – NHL)
From what I uncovered, the national basketball association is void of ocean animals as mascots. Please feel free to comment if you can think of another or just let me know if you have a favorite. Lastly, does anyone know where the Phillie Phanatic is originally from?
100 ocean quotes
Because there is not just one quote that summarizes how ethereal and majestic the ocean is, and in honor of World Oceans Day, and because you know I like lists, here is an archive of some inspiring quotes about the important aspects of our ocean all from people you may have heard of a time or two. If you have another favorite, please don’t forget to share and comment below.
1. “Man cannot discover new oceans unless he has the courage to lose sight of the shore.” – Andre Gide
2. “In one drop of water are found all the secrets of all the oceans” – Kahlil Gibran
3. “We know that when we protect our oceans we’re protecting our future.” – Bill Clinton
4. “It isn’t the oceans which cut us off from the world — it’s the American way of looking at things.” – Henry Miller
5. “The sea! the sea! the open sea!, The blue, the fresh, the ever free!” – Bryan W. Procter
6. “To me the sea is a continual miracle; The fishes that swim–the rocks–the motion of the waves–the ships, with men in them, What stranger miracles are there?” – Walt Whitman
7. “There is the life of the plankton in almost endless variety; there are the many kinds of fish, both surface and bottom living; there are the hosts of different invertebrate creatures on the sea-floor; and there are those almost grotesque forms of pelagic life in the oceans depths. Then there are the squids and cuttlefish, and the porpoises, dolphins and great whales.” – Sir Alister Hardy
8. “Every time we walk along a beach some ancient urge disturbs us so that we find ourselves shedding shoes and garments or scavenging among seaweed and whitened timbers like the homesick refugees of a long war.” – Loren Eiseley
9. “For whatever we lose (like a you or a me), It’s always our self we find in the sea.” – e.e. Cummings
10. “We are tied to the ocean. And when we go back to the sea, whether it is to sail or to watch – we are going back from whence we came…” – John F. Kennedy
11. “I seem to have been only like a boy playing on the seashore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.” – Isaac Newton
12. “Life is life’s greatest gift. Guard the life of another creature as you would your own because it is your own. On life’s scale of values, the smallest is no less precious to the creature who owns it than the largest.” – Lloyd Biggle Jr.
13. “It is a curious situation that the sea, from which life first arose, should now be threatened by the activities of one form of that life. But the sea, though changed in a sinister way, will continue to exist: the threat is rather to life itself.” – Rachel Carson
14. “We ourselves feel that what we are doing is just a drop in the ocean. But the ocean would be less because of that missing drop.” – Mother Teresa
15. “To me, the sea is like a person–like a child that I’ve known a long time. It sounds crazy, I know, but when I swim in the sea I talk to it. I never feel alone when I’m out there.” – Gertrude Ederle
16. “My soul is full of longing for the secrets of the sea, and the heart of the great ocean sends a thrilling pulse through me.” – Henry Wadsworth Longfellow
17. “The sea will grant each man new hope, and sleep will bring dreams of home.” Christopher Columbus
18. “Animal protection is education to the humanity.” – Albert Schweitzer
19. “The least movement is of importance to all nature. The entire ocean is affected by a pebble.” -Blaise Pascal
20. “You can’t do anything about the length of your life, but you can do something about its width and depth.” – Evan Esar
21. “Our knowledge is a little island in a great ocean of nonknowledge.” – Isaac Bashevis Singer
22. “The greatest use of life is to spend it for something that will outlast it.” – William James
23. “The ocean stirs the heart, inspires the imagination and brings eternal joy to the soul.” – Wyland
24. “The tradition of freedom of the high seas has its roots in an era when there were too few people to seriously violate the oceans — but in hindsight that era ended some 150 years ago.” – James Carlton
25. “The true peace of God begins at any spot a thousand miles from the nearest land.” – Joseph Conrad
26. “Why do we love the sea? It is because it has some potent power to make us think things we like to think.” – Robert Henri
27. “The sea hath no king but God alone.” – Dante Gabriel Rossetti
28. “We never know the worth of water till the well is dry.” – Thomas Fuller
29. “After a visit to the beach, it’s hard to believe that we live in a material world.” – Pam Shaw
30. “Primeval forests! virgin sod! That Saxon has not ravish’d yet, Lo! peak on peak in stairways set— In stepping stairs that reach to God! Here we are free as sea or wind, For here are set Time’s snowy tents
In everlasting battlements Against the march of Saxon mind.” – Joaquin Miller
31. “The oceans deserve our respect and care, but you have to know something before you can care about it.” – Sylvia Earle
32. “The sea, once it casts its spell, holds one in its net of wonder forever.” – Jacques Yves Cousteau
33. “A lot of people attack the sea, I make love to it.” – Jacques Yves Cousteau
34. “From birth, man carries the weight of gravity on his shoulders. He is bolted to earth. But man has only to sink beneath the surface and he is free.” – Jacques Yves Cousteau
35. “No aquarium, no tank in a marine land, however spacious it may be, can begin to duplicate the conditions of the sea. And no dolphin who inhabits one of those aquariums or one of those marine lands can be considered normal.” – Jacques Yves Cousteau
36. “Water and air, the two essential fluids on which all life depends, have become global garbage cans.” – Jacques Yves Cousteau
37. “The sea is emotion incarnate. It loves, hates, and weeps. It defies all attempts to capture it with words and rejects all shackles. No matter what you say about it, there is always that which you can’t.” -Christopher Paolini
38. “Because there’s nothing more beautiful than the way the ocean refuses to stop kissing the shoreline, no matter how many times it’s sent away.” -Sarah Kay
39. “Hark, now hear the sailors cry / smell the sea, and feel the sky / let your soul & spirit fly, into the mystic.” -Van Morrison
40. “Total physical and mental inertia are highly agreeable, much more so than we allow ourselves to imagine. A beach not only permits such inertia but enforces it, thus neatly eliminating all problems of guilt. It is now the only place in our overly active world that does.” -John Kenneth Galbraith
41. “It’s hard for me to put into words why I like the beach so much. Everything about it is renewing for me, almost like therapy… Beach Therapy.” -Amy Dykens
42. “A pool just isn’t the same as the ocean. It has no energy. No life.” – Linda Gerber
43. “I spent uncounted hours sitting at the bow looking at the water and the sky, studying each wave, different from the last, seeing how it caught the light, the air, the wind; watching patterns, the sweep of it all, and letting it take me. The sea.” – Gary Paulsen
44. “Fishes live in the sea, as men do a-land; the great ones eat up the little ones.” – William Shakespeare
45. “I could never stay long enough on the shore; the tang of the untainted, fresh, and free sea air was like a cool, quieting thought.” – Helen Keller
46. “When anxious, uneasy and bad thoughts come, I go to the sea, and the sea drowns them out with its great wide sounds, cleanses me with its noise, and imposes a rhythm upon everything in me that is bewildered and confused.” – Rainer Maria Rilke
47. “The ocean makes me feel really small and it makes me put my whole life into perspective… it humbles you and makes you feel almost like you’ve been baptized. I feel born again when I get out of the ocean.” – Beyoncé Knowles
48. “The sea does not reward those who are too anxious, too greedy, or too impatient. One should lie empty, open, choiceless as a beach – waiting for a gift from the sea.” – Anne Morrow Lindbergh
49. “The use of sea and air is common to all; neither can a title to the ocean belong to any people or private persons, forasmuch as neither nature nor public use and custom permit any possession therof.” – Elizabeth I, Queen of England
50. “The voice of the sea speaks to the soul. The touch of the sea is sensuous, enfolding the body in its soft, close embrace.” – Kate Chopin
51. “I felt the full breadth and depth of the ocean around the sphere of the Earth, back billions of years to the beginning of life, across all the passing lives and deaths, the endless waves of swimming joy and quiet losses of exquisite creatures with fins and fronds, tentacles and wings, colourful and transparent, tiny and huge, coming and going. There is nothing the ocean has not seen.” – Sally Andrew
52. “The waves of the sea help me get back to me.” – Jill Davis
53. “There’s nothing wrong with enjoying looking at the surface of the ocean itself, except that when you finally see what goes on underwater, you realize that you’ve been missing the whole point of the ocean. Staying on the surface all the time is like going to the circus and staring at the outside of the tent.” – Dave Barry
54. “I couldn’t imagine living in a state that didn’t reach the ocean. It was a giant reset button. You could go to the edge of the land and see infinity and feel renewed.” – Avery Sawyer
55. “If we don’t manage this resource, we will be left with a diet of jellyfish and plankton stew.” Daniel Pauly
56. “I want to get out in the water. I want to see fish, real fish, not fish in a laboratory.” —Sylvia Earle
57. “People ask: Why should I care about the ocean? Because the ocean is the cornerstone of earth’s life support system, it shapes climate and weather. It holds most of life on earth. 97% of earth’s water is there. It’s the blue heart of the planet-we should take care of our heart. It’s what makes life possible for us. We still have a really good chance to make things better than they are. They won’t get better unless we take the action and inspire others to do the same thing. No one is without power. Everybody has the capacity to do something.” – Sylvia Earle
57. “It is important to remember that the ocean’s resources are finite. The commitment these kids are making here today is a clear and compelling call to all of us to pay attention to our ocean.” – Ted Danson
58. “My boat is on the shore, And my bark is on the sea.” George Gordon Byron
59. “Even castles made from sand fall to the ocean” – Jimi Hendrix
60. “Ever since I was a child I’ve felt connected to water: lakes, rivers, streams––I love to jump in and swim around. But it’s the ocean where I go for rejuvenation, revelation, and solace.” Susan Rockefeller
61. “No love is Like an ocean with the dizzy procession of the waves’ boundaries …” – Jack Spicer
62. “I pray to be like the ocean, with soft currents, maybe waves at times. More and more, I want the consistency rather than the highs and the lows.” – Drew Barrymore
63. “Without water, our planet would be one of the billions of lifeless rocks floating endlessly in the vastness of the inky-black void.” – Fabien Cousteau
64. “We are blessed with a magnificent and miraculous world ocean on this planet. But we are also stressing it in ways that we are not even close to bringing under control.” – Carl Safina
65. “The world’s finest wilderness lies beneath the waves …” – Wyland
66. “It is particularly appropriate that we unveil this campaign on this first day of the annual international coastal clean-up effort, … Beach cleanups are something each of us can do any time of the year. I’m proud to be participating in the cleanup efforts today and I encourage everyone to make the time for these types of activities.” – Ted Danson
67. “The ocean is a mighty harmonist.” – William Wordsworth
68. “Limitless and immortal, the waters are the beginning and end of all things on earth.” – Heinrich Zimmer
69. “The more clearly we can focus our attention on the wonders and realities of the universe about us, the less taste we shall have for destruction.” – Rachel Carson
70. “The sea lives in every one of us …” – Wyland
71. “Always remember that the ocean delights in feeling your feet in her eternal bath …” – Wyland
72. “Ocean energy can contribute a great deal toward the protection or our atmosphere – without damaging marine ecosystems that are equally vital to the planet’s future.” – Fred Krupp
73. “Do what we will, the Colorado will one day find an unimpeded way to the sea.” – Donald Worster
74. “At the end of the day, no amount of investing, no amount of clean electrons, no amount of energy efficiency will save the natural world if we are not paying attention to it – if we are not paying attention to all the things that nature give us for free: clean air, clean water, breathtaking vistas, mountains for skiing, rivers for fishing, oceans for sailing, sunsets for poets, and landscapes for painters. What good is it to have wind-powered lights to brighten the night if you can’t see anything green during the day? Just because we can’t sell shares in nature doesn’t mean it has no value.” – Thomas L. Friedman
75. “It was the Law of the Sea, they said. Civilization ends at the waterline. Beyond that, we all enter the food chain, and not always right at the top.” – Hunter S. Thompson
76. “There is nothing more enticing, disenchanting, and enslaving than the life at sea.” – Joseph Conrad
77. “And I shall watch the ferry boats, and they’ll get high, on a bluer ocean against tomorrow’s sky. and i will never grow so old again, and i will walk and talk, in gardens all wet with rain…” – Van Morrison
78. “I have always been fascinated by the ocean, to dip a limb beneath its surface and know that I’m touching eternity, that it goes on forever until it begins here again.” – Lauren DeStefano
79. “A pool just isn’t the same as the ocean. It has no energy. No life.” – Linda Gerber
80. “No matter how remote we feel we are from the oceans, every act each one of us takes in our everyday lives affects our planet’s water cycle and in return affects us.” – Fabien Cousteau
81. “Into the ocean went a world more fantastic than any imagination could inspire …” – Wyland
82. “You never enjoy the world aright, till the sea itself floweth in your veins, till you are clothed with the heavens and crowned with the stars.” – Thomas Traherne
83. “I do an awful lot of scuba diving. I love to be on the ocean, under the ocean. I live next to the ocean.” – James Cameron
84. “I heard silence, silence infinite as the bottom of the ocean, a silence that sealed.” – Anne Spollen
85. “The virtues are lost in self-interest as rivers are lost in the sea.” – Franklin D. Roosevelt
86. “Waves are the voices of tides. Tides are life.” – Tamora Pierce
87. “The fishermen know that the sea is dangerous and the storm terrible, but they have never found these dangers sufficient reason for remaining ashore.” – Vincent Van Gogh
88. “Your heart is like the ocean, mysterious and dark.” – Bob Dylan
89. “Individuals of all ages can make an important difference in the overall health of our ocean by the actions they take every day. Simple things like picking up trash on the beach, recycling and conserving water can have a big impact on the health of our ocean.” – Ted Danson
90. “With every drop of water you drink, every breath you take, you’re connected to the sea. No matter where on Earth you live.” – Sylvia Earle
91. “That the sea is one of the most beautiful and magnificent sights in Nature, all admit.” – John Joly
92. “To stand at the edge of the sea, to sense the ebb and flow of the tides, to feel the breath of a mist moving over a great salt marsh, to watch the flight of shore birds that have swept up and down the surf lines of the continents for untold thousands of year, to see the running of the old eels and the young shad to the sea, is to have knowledge of things that are as nearly eternal as any earthly life can be.” – Rachel Carson
93. “The three great elemental sounds in nature are the sound of rain, the sound of wind in a primeval wood, and the sound of outer ocean on a beach” – Henry Beston
94. “There is, one knows not what sweet mystery about the sea, whose gently awful stirrings seem to speak of some hidden soul beneath.” – Herman Melville
95. “To heal the ocean, we must heal ourselves.” – Dr. Rod Fujita
96. “If you like to eat seafood or swim in the ocean, it’s time to get involved.” – Julie Evans-Brumm
97. “And I have loved thee, Ocean! And my joy of youthful sports was on thy breast to be borne, like thy bubbles, onward; from a boy I wantoned with thy breakers. They to me were a delight; and if the freshening sea made them a terror, ‘twas a pleasing fear.” – Lord Byron
98. “Catch a wave, and you’re sitting on top of the world.” – The Beach Boys
99. “The sea is not a bargain basement.” – Jacques Cousteau
100. “Only God almighty and naval research can save us from the perils of the sea.” – John Warner
Why is the blood of horseshoe crabs blue?
Horseshoe crabs use hemocyanin to distribute oxygen throughout their bodies. Hemocyanin is copper-based and gives the animal its distinctive blue blood. We use an iron-based hemoglobin to move oxygen around.
The blood of this living fossil has the ability to clot in an instance when it detects unfamiliar germs, therefore building up protective barriers to prevent potential infection. This adaptation has made the blood of the horseshoe crab quite desirable to the biochemical industry.
Image (c) wired.com
How have horseshoe crabs been able to remain unchanged for centuries?
In case you have not had the opportunity to get your hands on the new book, Horseshoe Crabs and Velvet Worms, about animals that have remained unchanged through time (Richard Fortey) here is a video from the BBC on how the horseshoe crab has been able to survive through the ages.
I am particularly fond of this clip because the horseshoe crab expert notes that the horseshoe crab, while an opportunistic and a generalist, is not an aggressive animal.
Please feel free to comment if you’re one of the few that has eaten horseshoe crab eggs.
What people are saying …