Spotted Kelpfish

Gibbonsia elegans

The Spotted Kelpfish is a small, slender fish found in the subtropical waters of the Pacific Ocean, ranging from central California to southern Baja California, Mexico. It thrives in subtidal rocky habitats with abundant seaweed, typically at depths from the lower intertidal zone to about 30 meters. This fish is known for its ability to change color over several weeks, adapting to its surroundings by matching the dominant algae color in its habitat. These color morphs include red, green, and brown, which help it blend into the seaweed and avoid predators. The Spotted Kelpfish reaches a maximum length of 16 centimeters and features a compressed body with a triangular head. Its dorsal fin runs the entire length of its body, and its caudal fin is rounded. The fish is not sexually dimorphic in color, but females tend to be longer and have yellow or tan bellies, while males and immature females have white bellies. This species feeds primarily on small crustaceans, such as amphipods and isopods, and also consumes polychaete worms and microgastropods found on the same plants it inhabits. During the spawning season from January to June, females lay eggs in aquatic vegetation, with males guarding the egg masses. The Spotted Kelpfish is classified as Least Concern by the IUCN. Divers may encounter this cryptic fish hiding among seaweed, where it uses its camouflage to remain concealed.