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What is shark finning?

February 1, 2012 by 2 Comments

There has been a lot in the news recently about shark finning. It’s the inhumane practice of capturing a shark, slicing its fins off (shark fin soup is an expensive delicacy popular at Chinese weddings and Chinese New Year celebrations), and tossing the rest of the animal overboard to bleed out a die.

As noted on the Save Our Seas Foundation website, “Compared to other commercial fisheries, the shark-fin industry is opaque, secretive, and often operates in a legal grey area, exploiting loopholes in anti-finning laws and keeping few records. In addition to this, reporting can be unreliable and misleading, as member countries of the UN Food and Agriculture Organisation (FAO) report shark catches with varying degrees of detail and accuracy”. There is some forward momentum. A ban has been put in place in California, Hawaii, Oregon, and Washington to end the practice. California will also implement a ban on the importation of fins starting January 1, 2013. Although, as the LA Times writes, it is still an uphill battle in China.

Wildaid, in conjunction with artist Kiki Karpus, created this powerful “What is shark finning?” infographic as a way to understand more on the harmful effects the practice has on the entire ocean ecosystem.

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New ‘marine life encyclopedia’ launched

September 12, 2011 by Leave a Comment

I think there might be another great bookmark to add to your ocean facts files! Please spend some time reviewing this great new resource, a marine life encyclopedia, compiled by Oceana. Over 500 creatures, places, and concepts can be explored. The pictures are bright and colorful and the information is up-to-date and easy to digest. It seems fantastic if you want a quick answer to a question.

Even if you think you know all the answers, test yourself with this Ocean IQ quiz!

The content on the marine life encyclopedia site has been licensed to Dorling Kindersley, one of the world’s leading educational publishers.

Filed Under: Algae (Seaweeds), Animal Homes, Arthropods, Atlantic Horseshoe Crab, Beach, Biodiversity, Birds, Bivalves, Bony Fishes, Cephalopods, Cnidaria, Coral Reef Ecosystems, Crustaceans, Echinoderms, Egg Cases, Fish, Jellyfish or Jellies, Marine Mammals, Mollusks, Ocean, Penguins, People, Places, Plants, Random Fun!, Reptiles, Sea Turtles, Seashells, Sharks, Skates and Rays, Test Your Knowledge, Univalves, Weather, Wrack Line Tagged With: , ,

Save Our Seas Foundation

June 29, 2011 by 3 Comments

In case you didn’t notice, every month I like to share one of my favorite marine science conservation website or blogs. And, even though I just posted on The Daily Ocean I want to highlight the Save Our Seas Foundation.

This is the organization (or ‘organisation’ since they are based in Switzerland) that produces the Naked Oceans podcast (one of the 8 great podcasts listed on the right sidebar). The website for this major player in the fight to save the world’s oceans manages to be in-your-face while still maintaining class and a jovial nature. They cite important messages in large font in the center of the page followed up with bullets and lists (see the threats page for a great example of this).

Also, the blog for Save Our Seas Foundation posts pertinent information (in an easy to digest language) about the research projects their own science team is conducting with pictures they actually took in the field. A lot of the focus of their research is on sharks. Recently they hosted a Dutch film crew doing a documentary between the relations of sharks and surfers (no, they aren’t cousins).

All in all, it seems as though the people working with the Save Our Seas Foundation are dedicated, passionate, and fun and I hope you follow and support them in the future.

Filed Under: Ocean, People, Places, Random Fun!, Sharks Tagged With: , ,

It’s a Great White Expedition!

April 15, 2011 by Leave a Comment

This is some footage from the series Shark Men from the National Geographic Channel. These scientists are under the gun to get a great white shark back in the water alive while still gathering all the pertinent data. AMAZING!

Filed Under: Fish, Sharks Tagged With:

It’s as easy as A, B, Sea: Y for Yellowfin Tuna

February 27, 2011 by Leave a Comment

Yellowfin tuna are the most commercially sought after of all tunas. They have a football shaped body and can reach up to 450 pounds. Which is very impressive since they can also swim up to 30 miles per hour. Yellowfin tuna prefer to swim in schools in all temperate oceans. They prefer to eat fish any fish smaller than themselves and their biggest predator tend to be sharks.

Image (c) ilovebluesea.com

Filed Under: Bony Fishes, Fish, Sharks Tagged With: , ,

It’s as easy as A, B, Sea: R for Remora

February 18, 2011 by Leave a Comment

Remora refers to any member of a group of fish that can attach themselves to other fishes (usually sharks) or ships by way of a suction disk on the top of their head.They typically eat anything that falls from the sharks mouth. Do the lyrics from the Jimmy Buffet song, Fins, make sense now?

“But now she feels like a remora,
’cause the school’s still close at hand.
Just behind the reef are the big white teeth
of the sharks that can swim on the land.”

Enjoy this video from a scuba diver that was mistaken for a shark as two juvenile remoras try to attach themselves to him. I added the video so you can get a really good sense of the suction discs on the top of their heads.

Filed Under: Fish, Sharks

It’s as easy as A, B, Sea: O for Operculum

February 15, 2011 by Leave a Comment

Operculum is the hard scalelike cover of the gills of bony fishes. Cartilaginous fishes (such as sharks, skates and rays) all lack a gill cover.

Image (c) www.webs.lander.ed

Filed Under: Bony Fishes, Fish, Sharks, Skates and Rays

Whales don’t have scales

October 10, 2010 by Leave a Comment

That’s right. Whales are covered in blubber because they are mammals like you and I. Now the fish in the sea are another story. You might not realize it, but, if you’ve ever had the opportunity to touch a shark they are covered in scales just like other bony fish. There are several main types of scales that cover fish. See if you can figure out which cover sharks.

1.) Ctenoid scales: These scales are comb-like with the ends having small teeth-like structures.

2.) Ganoid scales: These scales are heavy and diamond-shaped.

3.) Cycloid scales: These are round scales with smooth edges.

4.) Cosmoid scales: These scales are very hard and covered in enamel.

5.) Placoid scales: These scales have teeth-like edges. They are different than ctenoid scales because they lack they rounded front.

Scales grow out of the skin and have modified to quite a few different versions over the years. In fact, the feathers of a bird are a type of evolved scale!

Filed Under: Bony Fishes, Fish, Sharks, Skates and Rays

How do fish give birth?

September 10, 2010 by 7 Comments

There are three general ways fish in the sea give birth to a new generation.

I will start off explaining what is most familiar to us, fish that give birth to live young. This is called being viviparous. There is a structure similar to the placenta that connects the embryo to the mother’s blood supply. Some shark species are viviparous. In fact, in some shark species such as the shortfin mako, the embryo has been known to eat other eggs developed by the mother.

Next is something similar called giving birth oviviparously. This is when the embryo develops inside of an egg that is inside the mother. The difference between this and viviparity is that the embryo gets no nourishment from the mother. Nutrients are taken from within the egg. Coelacanths are a type of oviviparious fish.

Lastly, I will go over how 97% of fish species reproduce. These are the fish that lay many, many eggs and hide them in a dark corner so predators can’t get to them. This is called being oviparous. With most oviparous fish species fertilization takes place outside the body. But with many types of skates and rays (pictured right) the male will use his claspers to internally fertilize the female eggs before she lays them.

Image (c) www.gma.org

Filed Under: Bony Fishes, Egg Cases, Fish, Sharks, Skates and Rays Tagged With: , , ,

15 facts about sharks

August 4, 2010 by 1 Comment

1.) Sharks are divided into 8 orders.
2.) Sharks are again divided into 34 families.
3.) There are over 360 shark species.
4.) The largest meat eating shark is the great white shark (37 feet).
5.) The largest shark is the whale shark (and largest fish overall), a filter feeder.
6.) The second largest shark (and fish) is also a filter feeder, the basking shark.
7.) Dwarf laternfish (7 1/2 -8 inches), the spined pygmy shark (8 inches) and the pygmy ribbontail catshark (7-7 1/2/ inches) are among the smallest of the sharks.
8.) The fastest swimming fish are the mako and blue sharks which can swim upwards to 60 miles per hour.
9.) The shark with the strongest bite is the dusky shark with a jaw of 132 pounds of force.
10.) The dogfish is the most common shark species.
11.) The deepest diving fish is the Portuguese shark.
12.) The shark with the longest migration has been found to be the blue shark.
13.) Megalodon was an ancient shark that may have been 2 or 3 times as long as a great white shark.
14.) Megalodon means “giant tooth”.
15.) The fossilized teeth of a megalodon are as large as an adult’s hand.

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