The Barnaclebill Blenny (Hypsoblennius brevipinnis) is a small, charismatic species of blenny belonging to the family Blenniidae, commonly referred to as combtooth blennies. This species is known for its association with barnacles, where it often seeks shelter and protection. Typically grows to around 5–8 cm (2–3 inches) in length. Omnivorous, feeding primarily on algae, small invertebrates, and organic detritus.