HomeFish encyclopediaRay-finned fishesPerch-like fishDragonetsLongtail dragonet Longtail dragonet (Callionymus gardineri) Scientific name: Callionymus gardineri Regan, 1908 The Longtail dragonet (Callionymus gardineri) is a marine fish of the family Callionymidae. Native range: Western Indian Ocean, south to Natal, South Africa. BiologyDorsal spines (total): 4; Dorsal soft rays (total): 9; Anal spines: 0; Anal soft rays: 8. Body light to dark brown in color; black blotch on distal portion of 3rd dorsal spine; black submarginal band on anal fin.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCallionymus gardineriFamilyCallionymidae (Dragonets)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length28.0Depth range30–180 m (98–591 ft)EnvironmentMarine; demersal; depth range 30 - 180 mClimateTropicalDistributionWestern Indian Ocean: south to Natal, South Africa.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceMedium, 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