The Clinid fish, also known as blennies, is a popular marine fish among aquarium keepers. These small and active fish are known for their interesting appearance and behavior. There are several synonyms for Clinid fish, including rock blenny, combtooth blenny, and feather blenny. The rock blenny gets its name from its preference for living among rocks and crevices. Combtooth blennies have distinctive comb-like teeth, which they use to scrape algae off rocks. Feather blennies have elongated dorsal fins that resemble feathers. Regardless of their name, all of these fish are fascinating creatures that can make a great addition to any marine aquarium.