HomeFish encyclopediaRay-finned fishesPerch-like fishDragonetsLong-tail dragonet Long-tail dragonet (Callionymus neptunius) Scientific name: Callionymus neptunius Seale, 1910 The Long-tail dragonet (Callionymus neptunius) is a marine fish of the family Callionymidae. Native range: Western Central Pacific, Philippines, Papua New Guinea and Indonesia. BiologyFound in small groups in sandy estuaries. Females much smaller in size.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCallionymus neptuniusFamilyCallionymidae (Dragonets)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length13.0Depth range3–6 m (10–20 ft)EnvironmentMarine; demersal; depth range 3 - 6 mClimateTropicalDistributionWestern Central Pacific: Philippines, Papua New Guinea and Indonesia.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