In the wild these fish dwell at great depth in the oxygen minimum zone feeding largely on brittle stars. Spawned gelatinous egg masses float to the surface where larvae can be recovered and bred.
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.
Depth10 m, size about 20 cm. Adults such as this one feed on crabs, octopi, shrimps, and occasionally other fishes, mainly at night. They are solitary, territorial, and bottom dwelling.