HomeFish encyclopediaRay-finned fishesFlatfishesLefteye floundersEast coast flounder East coast flounder (Arnoglossus dalgleishi) Scientific name: Arnoglossus dalgleishi von Bonde, 1922 The East coast flounder (Arnoglossus dalgleishi) is a marine fish of the family Bothidae. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 101-108; Anal spines: 0; Anal soft rays: 78 - 83. Dark blotches on dorsal and anal fins; last 3 pelvic rays on eyed side and 1st 3 dorsal rays darkened.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameArnoglossus dalgleishiFamilyBothidae (Lefteye flounders)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length19.0Depth range50–220 m (164–722 ft)EnvironmentMarine; demersal; depth range 50 - 220 mClimateTropicalDistributionIndo-Pacific: Natal (South Africa), Zanzibar (Tanzania), Mombasa (Kenya) and northeastern Indian Ocean, as well as Mozambique. Known also from the south coast of Java.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercialResilienceMedium, 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