HomeFish encyclopediaRay-finned fishesPerch-like fishLabrisomidsOne-eyed blenny One-eyed blenny (Paraclinus monophthalmus) Scientific name: Paraclinus monophthalmus G?nther, 1861 The One-eyed blenny (Paraclinus monophthalmus) is a marine fish of the family Labrisomidae. Native range: Eastern Central Pacific, Costa Rica and Panama. BiologyA relatively rare species found in shallow weedy areas.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameParaclinus monophthalmusFamilyLabrisomidae (Labrisomids)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length8.5EnvironmentMarine; demersalClimateTropicalDistributionEastern Central Pacific: Costa Rica and Panama.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmless SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026