This is a male cabezon--females generally are green. Cabezon lack scales and have skin flaps over their snout and eyes. They often take shelled animals such as crabs, abalone and other snails but also squid, octopus, and fish. Depth 20 m.
Here, a cabezon has deposited her eggs on California hydrocoral where a male will ferlilize them. Though these fish are very tasty, their roe is highly toxic, at least to mammals. Males, however, often guard the nest suggesting the eggs have some vulnerability. Depth 23m.