HomeFish encyclopediaRay-finned fishesClingfishesClingfishes and singleslitsSao Tom? clingfish Sao Tom? clingfish (Apletodon wirtzi) Scientific name: Apletodon wirtzi Fricke, 2007 The Sao Tom? clingfish (Apletodon wirtzi) is a marine fish of the family Gobiesocidae. Native range: Eastern Central Atlantic, Sao Tome and Principe. BiologyThis small species is characterized by the following: 5-6 dorsal-fin rays; 5-7 anal-fin rays; 20-25 pectoral-fin rays; 3 mandibular canal pores; head width in males 3.6-4.0 (mean 3.84) in SL; male anus has distinct papillae; the anal-fin length distance between anus and anal-fin origin 2.9; snout in males long, more or less pointed, conical; preorbital length in males 3.1?4.0 in head length; occipital region with a large dark pinkish blotch behind each eye; and the lower sides of the body with a row of dark blotches, scattered with white spots in between.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameApletodon wirtziFamilyGobiesocidae (Clingfishes and singleslits)OrderGobiesociformes (Clingfishes)ClassActinopterygii (Ray-finned fishes)Maximum length1.4Depth range1 m (3 ft)EnvironmentMarine; pelagic-neritic; depth range ? - 1 mClimateTropicalDistributionEastern Central Atlantic: Sao Tome and Principe.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (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