HomeFish encyclopediaRay-finned fishesPerch-like fishThreefin blenniesYaldwyn's triplefin Yaldwyn's triplefin (Notoclinops yaldwyni) Scientific name: Notoclinops yaldwyni Hardy, 1987 The Yaldwyn's triplefin (Notoclinops yaldwyni) is a marine fish of the family Tripterygiidae. In the aquarium it needs water at 13°C (55°F). Native range: Southwest Pacific, around mainland New Zealand. Yaldwyn's triplefin care at a glanceTemperature13°C (55°F) BiologyOccurs in rock pools and subtidal areas. Found at exposed sites, usually near darker overhangs and walls among encrusting organisms.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameNotoclinops yaldwyniFamilyTripterygiidae (Threefin blennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length5.2Depth range0–20 m (0–66 ft)EnvironmentMarine; demersal; depth range 0 - 20 mClimateTemperateDistributionSouthwest Pacific: around mainland New Zealand.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceHigh, 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