The appearance of these fish can vary, ranging from shades of smart blue-black to charcoal or brownish gray with clear stripes.

[2] Breeding males develop light yellow-tan patches on their cheeks that become more vivid when they defend their territory and disappear when they leave.

[2] The female attaches up to 10,000 eggs to the walls of the crevice, which the male fertilizes and then guards until they hatch, typically taking about two weeks.

[2] The larvae venture into the sea for an unspecified duration before returning to tide pools when they reach approximately half an inch in length.

[3] These fish are commonly found in tranquil pools above the high tide line and swim using side-to-side movements with their pectoral fins tucked along their sides.