The sarcastic fringehead (Neoclinus blanchardi) is a small but hardy saltwater tube-blenny that possesses a large mouth and aggressive territorial behavior, for which it has been given its common name. The term 'fringehead' reflects the distinctive ruff of tissue surrounding the fish's neck, while the adjective 'sarcastic' adds a layer of intrigue, hinting at the fish's combative and often humorous nature.