Five Fascinating Facts About Sea Stars

1.Sea Stars Are Echinoderms, Not Fish

Despite commonly being called starfish, sea stars are not a fish species. They do not have gills, scales, or tails like fish. They also do not have a backbone, so they are considered an invertebrate species. More specifically, they belong to a family called Echinoderms. Being an Echinoderm means that members of these species have five-point radial symmetry (even though some sea stars have different numbers of arms! (See fact number 2) Read More