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Animals, Plants and Habitat

Sea Star Identification on King County Beaches

Spiny Red Sea Star
Hippasteria spinosa


Probably one of the most beautiful sea stars. Its spiny surface, vermilion color and short arms (R/r = 1.7 to 2.6) cannot be confused with any other star in this region. It is usually sub tidal but can sometimes be found on the beach. It can be up to a foot in diameter. The spiny red sea star feeds primarily on the orange sea pen and the white plume anemone, sea squirts, sand worms and eggs of sea slugs.