HomeFreshwater aquarium fishOther freshwater fishCloister blenny Cloister blenny (Omobranchus elongatus) Scientific name: Omobranchus elongatus Peters, 1855 The Cloister blenny (Omobranchus elongatus) is a brackish-water fish of the family Blenniidae. In the aquarium it needs water at 22–28°C (72–82°F). Native range: Indo-West Pacific, Tanzania and Mozambique to New Guinea, north to the Ryukyu Islands. Cloister blenny care at a glanceTemperature22–28°C (72–82°F) BiologyDorsal spines (total): 12 - 14; Dorsal soft rays (total): 17-20; Anal spines: 2; Anal soft rays: 21 - 23. Irregular bands on body. Males with spot and stripes in middles of soft dorsal fin.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOmobranchus elongatusFamilyBlenniidae (Combtooth blennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length5.0EnvironmentMarine; brackish; reef-associatedClimateTropicalDistributionIndo-West Pacific: Tanzania and Mozambique to New Guinea, north to the Ryukyu Islands.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More other freshwater fishSouth American lungfishLepidosiren paradoxaLined soleAchirus lineatusPumpkinseedLepomis gibbosusShort-tailed pipefishMicrophis brachyurus brachyurusFinescale tigerfishDatnioides microlepisFreshwater garfishXenentodon cancilaSee all other freshwater fish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026