“There’s been a lot of work over the years on vision in a variety of fish from shallow water to the deep sea, but there hasn ... While earlier studies had shown that some starfish that live in ...

Additionally, a new species of brittle star, Ophiura pohangensis, was discovered in Miocene deep-sea deposits in ... of marine animals that includes starfish, sea urchins, and brittle stars ...

But most echinoderms -- a group of some 7,000 species that includes brittle stars and similarly brainless starfish, sea urchins and sea cucumbers -- have not been tested. To find out if brittle stars ...