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 ...

Recent research in brittle star systematics and taxonomy has focused on identifying new species, clarifying existing classifications, and understanding the genetic relationships among different ...

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Along the western coast of Mexico, a patterned sea creature stretched its five arms across the sandy coral. Something about ...

To investigate whether similar genes were involved in regenerating limbs in other animals, the team looked at the genes expressed during regeneration across distantly related species. They compared ...