HomeFish encyclopediaRay-finned fishesPerch-like fishRoundheadsSouthern longfin Southern longfin (Beliops xanthokrossos) Scientific name: Beliops xanthokrossos Hardy, 1985 The Southern longfin (Beliops xanthokrossos) is a marine fish of the family Plesiopidae. Native range: Eastern Indian Ocean, Australia. BiologyAdults occur inshore near reef areas. Benthic. Eggs are guarded by the male parent.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameBeliops xanthokrossosFamilyPlesiopidae (Roundheads)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length2.6EnvironmentMarine; demersal; non-migratoryClimateTemperateDistributionEastern Indian Ocean: Australia.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