HomeFish encyclopediaRay-finned fishesClingfishesClingfishes and singleslitsGiant clingfish Giant clingfish (Haplocylix littoreus) Scientific name: Haplocylix littoreus Forster, 1801 The Giant clingfish (Haplocylix littoreus) is a marine fish of the family Gobiesocidae. Native range: Southwest Pacific, endemic to New Zealand. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 5-6; Anal spines: 0; Anal soft rays: 8 - 9. Color ranging from uniform olive green to golden brown or yellowish, sometimes lighter ventrally. Sometimes with darker streaks over the head and body or patches of white or pink. Distinguished from other clingfishes by its large size, broad spade-like body, and structure of sucking disc (absence of a fold of skin on the anterior margin of the rear portion).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHaplocylix littoreusFamilyGobiesocidae (Clingfishes and singleslits)OrderGobiesociformes (Clingfishes)ClassActinopterygii (Ray-finned fishes)Maximum length15.0Depth range0–12 m (0–39 ft)EnvironmentMarine; demersal; depth range 0 - 12 mClimateTemperateDistributionSouthwest Pacific: endemic to New Zealand.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 years (Fec = 50) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026