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SEASTARS (Asteroidea)
Biodiversity > Marine Life > Echinoderm > Seastars

Seastars (Class Asteroidea) are the best-known echinoderms. Most species have five arms, although some species have more. Each arm is hollow and contains identical sets of respiratory, digestive, locomotory and sensory organs. In some species, the arms are suppressed and the body is pentagonal in shape. The seastar skeleton consists of small calcium plates embedded in the body wall, connected by body tissue and muscle.
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