HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesBig-eyed tongue-sole Big-eyed tongue-sole (Cynoglossus macrophthalmus) Scientific name: Cynoglossus macrophthalmus Norman, 1926 The Big-eyed tongue-sole (Cynoglossus macrophthalmus) is a marine fish of the family Cynoglossidae. Native range: Indo-West Pacific, northwestern Australia. BiologyOne nostril on eyed side of head (Ref 9895).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCynoglossus macrophthalmusFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length27.7EnvironmentMarine; demersalClimateTropicalDistributionIndo-West Pacific: northwestern Australia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026