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
Marine & Freshwater Environmental Education
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
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It was another great weekend on the beach for my family and everyone had new and exciting Beach Chair Scientist questions. The best part about being a Beach Chair Scientist is clarifying misconceptions, so I am going to start with the question that seemed to garner the most discussion this weekend “What are jellyfish?”. Jellyfish, […]
Remember what I was saying back in January? Science still isn’t scary and still has funny words. Here are a few more that just make me smile. Hopefully they make you smile when you say them or you know a fun science word too. Has anyone taught you a science word you love? If you […]
It’s my favorite time of year. This is the best time to explore the beach. It’s still sunny and warm, there are frequent storms (you’ll see why that matters later), and there are few people on the beach. For another six weeks along the mid-Atlantic (before it gets too cold), I encourage you to spend […]
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 […]
According to the Discovery Health Channel, it is estimated that 1 in 3 beach goers do not know how to swim. The rational is that if you were not taught as a child then there is a hesitation to learn to swim as an adult. Do you have another great question? Check out www.beachchairscientist.com and […]
On Feb. 13, 1997, about 20 miles off the coast of England, a massive wave hit the freighter Tokio Express, toppling 62 giant containers into the rough north Atlantic seas. Trapped inside one of them: nearly 5 million Legos. Many floated to the surface. Carried by currents, they’re still being found on beaches around the world […]
You must be brave enough to pinch the body of the blue crab from behind and lift it upside down (It hurts a lot if they pinch you!). Male blue crabs have a distinct shape like a pencil – or the Washington Monument – in the center of their bellies. Female blue crabs, on the […]
Good rule of thumb would be that whelks are found in temperate water and conchs are found in more tropical waters. Also, conchs have eyeballs, while whelks have eyespots. If you’re lucky enough to catch them while feasting, whelks are carnivores and conchs are herbivores. Also, their body colors are different. Conchs tend to be […]
Yes. For instance, the sperm whale will blow forward and to the left. The vapor will be about 6 feet tall. Right whales and bowhead whales will have a v-shaped blow. The right whales will be about 15 feet tall while the bowhead whales will be higher at 21 feet tall. Humpback whales have a […]
Thanks to Inland Ocean Coalition for sharing this information about this upcoming Saturday: “Join the movement on February 3rd for International Strawfree Day! Every day the United States uses 500 million straws, enough to encircle the earth 2.5 times! The global total is undoubtedly much larger. Please do your part and say no to straws […]
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