This seastar is an active predator of snails, bivalves, barnacles, and small chitons. It is not feeding on the anemones it straddles here. Diameter about 45 cm. Depth 18 m.
Hundreds observed in hot spring and when approached, most quickly leaped into water. Adults, juveniles and tadpoles viewed. Above grayish, brown, or greenish with dark spots and pale, dorsolateral ridges that reflected inward at rear; below white. Two males examined measured: SVL 77 mm (3 in.); SVL 50 mm (2 in.); juveniles measured 40 mm (1 in.); SVL 45 mm (1 in.).