Redlip Blenny

The Redlip Blenny (Ophioblennius macclurei) is a combtooth blenny in the family Blenniidae, common on shallow rocky and coral reef edges throughout the Caribbean Sea and adjacent western Atlantic waters. It is named for its conspicuously bright red-orange lips, which stand out against its otherwise dark body and make it one of the more easily recognized small reef blennies in the region. The species is highly territorial and spends most of its time perched on exposed rock or coral surfaces in the reef's high-energy, shallow surge zone. It is not considered threatened and remains abundant throughout its range, playing an important role as a grazer that helps control algal growth on reef substrate.

• Body: elongated, scaleless, dark olive-brown to blackish, 10-15 cm at maturity
• Marking: bright red-orange lips, the species' defining feature
• Fins: tall, continuous dorsal fin running nearly the length of the body
• Head: blunt profile with small branched cirri (fleshy tentacles) above each eye

The vivid red-orange lip coloration reliably separates the Redlip Blenny from other similarly dark, elongated blennies sharing its Caribbean range, most of which lack this bright lip color. Its habit of perching upright on exposed rock rather than hiding in crevices is also a useful behavioral cue.

Redlip Blennies inhabit shallow rocky and coral reef edges throughout the Caribbean Sea, the Bahamas, and adjacent western Atlantic coastal waters, typically at depths of less than 3 meters in high-energy surge zones. They favor exposed rock and dead coral surfaces with algal turf cover, where they can perch and graze while remaining close to crevices for shelter. The species tolerates strong wave action and shallow, well-oxygenated water, and is rarely found on deeper reef slopes away from the shallow, algae-rich substrate it depends on for food.

Redlip Blennies are strongly territorial, with individuals defending small patches of algae-covered rock from other blennies and grazing herbivores through aggressive chases and mouth-gaping displays. They feed almost continuously during daylight hours, using comb-like teeth to scrape filamentous algae from rock and dead coral surfaces. Males attract females to a chosen crevice or hole for spawning, where the female deposits adhesive eggs that the male then guards and aerates until hatching. As one of the more abundant algae grazers on Caribbean reefs, the species plays a meaningful ecological role in limiting algal overgrowth that can otherwise smother coral.