GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY
Brittle star (Ophiothrix sp., red) wrapped around a sea squirt, or tunicate, (Rhopaleae crassa, blue). The brittle star is a relative of the starfish. It has thin arms that it uses for locomotion. A sea squirt is a sessile filter- feeding animal. Photographed off Indonesian Borneo.
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