Yellow Coris Blenny

The Yellow Coris Blenny is a charming and underappreciated combtooth blenny that brings a warm splash of yellow-brown coloration to the reef aquarium. This compact species reaches a maximum size of approximately 3.5 inches and features a body that ranges from soft golden-yellow to warm brown, often with subtle darker markings along the flanks and a characteristic blenny face complete with expressive eyes and hair-like cirri above the eyes. Its coloration can shift depending on mood and environment, sometimes appearing more golden and at other times taking on deeper brown tones.

In the wild, Ecsenius ops inhabits shallow reef areas and rubble zones throughout the Western Pacific, particularly around the Philippines and Indonesia. Like other Ecsenius blennies, it is a dedicated algae grazer that spends its days perched on rocks and coral rubble, methodically scraping filamentous algae and diatoms from hard surfaces with its comb-like teeth. This natural behavior makes it a valuable addition to reef aquariums, where it helps control nuisance algae growth on rockwork, glass, and equipment.

The Yellow Coris Blenny is an excellent beginner species that combines ease of care with engaging personality. It is captive bred by several facilities, making sustainably sourced specimens readily available and generally hardier than wild-caught alternatives. The species is completely reef-safe, showing no interest in corals or ornamental invertebrates, and its peaceful temperament makes it compatible with virtually all community reef inhabitants. Its habit of perching on rock outcrops and peering around with curious, alert eyes gives it an endearing personality that makes it a favorite among blenny enthusiasts.