Mussel Blenny

Hypsoblennius jenkinsi

The mussel blenny is a small species of combtooth blenny that inhabits the eastern-central Pacific Ocean, ranging from southern California to Puerto Marquez, Mexico, including the Gulf of California. It can grow up to 13 centimeters in length. This blenny is typically found in rocky areas, where it makes use of holes and crevices for shelter. Often, it can be seen inhabiting burrows of boring clams or tubes of marine worms, and it is also commonly found in mussel beds. The mussel blenny is a non-migratory, demersal fish, meaning it lives near the sea floor. It is mostly sedentary and territorial, preferring to stay within its chosen habitat. This species spawns in nearshore environments, with eggs that are demersal and adhesive, attached to substrates via a filamentous pad. The larvae are planktonic and are usually found in shallow coastal waters. Divers encountering the mussel blenny can expect to find it in depths ranging from 1 to 21 meters, though it is most commonly found up to 10 meters deep. It is a harmless species and is classified as Least Concern by the IUCN. Observing this blenny can be a unique experience as it often remains in its territory, making it easier to spot in its natural habitat.