Classical conditioning has been demonstrated in a handful of previous studies in starfish. But most echinoderms -- a group of some 7,000 species that includes brittle stars and similarly brainless ...
An curved arrow pointing right. Scientists were observing a field of brittle sea stars off Jarvis Island when they saw something they never expected: One of the brittle stars snatched a squid ...
A brittle star. Photo by the Florida Museum of Natural History Invertebrate Zoology. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert!