Topic: echinoderms

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The differences between a living and a dead sand dollar

How can you tell if a sand dollar is dead or alive? Sand dollars are flat sea urchins that burrow into the soft sand. When alive, their undersides are full of "velvet-textured spines" covered with cilia, a latin word ...

Under The Dock, a marine life series by Hakai Institute

Described as a fearsome predator on the British Columbia coast, sunflower sea stars "can grow to a diameter of one meter, and have a voracious appetite for all sorts of animals on the rocky reef." From Hakai Institute...

Swimming Feather Starfish

The video above was filmed by Pim Van Schendel who saw the swimming feather starfish -- a crinoid, meaning "lily-like" in Greek -- during a dive in Indonesia. According to the Monterey Bay Aquarium, video below, fossi...

Sea cucumbers are underwater vacuum cleaners

Join biologist Professor Ove Hoegh-Guldberg on the ocean sandy floor of Australia's Great Barrier Reef to witness an incredibly important ecological process: sea cucumbers pooping. Why is this so important? When se...

Feather star swimming off the coast of Japan

This is a feather star swimming off the coast of Japan. Feather stars are crinoids or crinoidea, meaning "Lily-like" in Greek, and thrive in the Indian Ocean up to Japan, as well as in the Atlantic. From Wild Singapor...

A Nine Armed Sea Star flips itself over

If you happen to spot a Nine Armed Sea Star under the sand, perhaps it’s kindest to not disturb it. But you know, since this one has already been disturbed, watch how it flips itself over f...

The largest sea star in the world: a sunflower sea star eating

What if you didn’t send food down to your stomach to digest it, but you sent your stomach up to your food instead? This is exactly what the sunflower seastar does. With 16 to 24 arms and...

Feather Stars Swimming

We started at Neatorama's link of a Feather Star swimming, and then found a video of a few of them together, above. From Encyclopedia Britannica: feather star, any of the 550 living species of crinoid marine ...


 
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