Yaeyama Blenny (Ecsenius yaeyamaensis)

Fish in the family Blenniidae. Moderate care. Reef Safe.

Yaeyama Blenny

Quick facts

Scientific nameEcsenius yaeyamaensis
FamilyBlenniidae
Care levelModerate
Reef safetyReef Safe
TemperamentPeaceful
Dietomnivore
Adult size3.5 in
Minimum tank size20 gallons
Water parametersTemperature: 72-79°F pH: 8.1-8.3 Salinity: 1.02-1.025
Feeding schedule2-3 times daily

Appearance

Ecsenius yaeyamaensis is a small blenny reaching about 3.5 inches at maturity. It displays a mottled brown and tan coloration with darker banding, allowing effective camouflage on reef rocks. The species has the characteristic high-set eyes and terminal mouth typical of the Blenniidae family.

Diet and feeding

Primarily a grazer feeding on small crustaceans, zooplankton, and algae in the wild. In captivity, offer high-quality frozen foods (mysis shrimp, copepods) and quality flake foods designed for small reef fish 2-3 times daily.

Difficulty and care for the Yaeyama Blenny

Moderate difficulty. This species requires stable reef conditions, consistent feeding of appropriate small foods, and a peaceful community. It is not hardy for beginners but is manageable for intermediate aquarists with attention to water quality and diet.

Common health issues

Parasitic infections (ich, marine velvet), starvation if not provided adequate small foods, fin damage from aggressive tank mates

Origin and habitat

Western Pacific, endemic to the Yaeyama Islands (Okinawa Prefecture, Japan). This species is found in shallow reef environments of this specific island group.

Log Yaeyama Blenny in your reef tank

Reef Trak gives you the full record on every species in your tank: acquisition date, source, photos, parameters at time of stocking, and links to maintenance and feeding events. Track Yaeyama Blenny alongside everything else in your reef.