Esmark's Brittle Star

Ophioplocus esmarki, commonly known as Esmark's brittle star or the smooth brittle star, is a species of brittle star in the family Hemieuryalidae. It can be found from the low intertidal to a depth of 70 m, from Northern California to Baja California. This is one of the few brittle star species that is visible during daylight hours.