HomeFish encyclopediaRay-finned fishesPipefishes and SeahorsesPipefishes and seahorsesSouthern little pipehorse Southern little pipehorse (Idiotropiscis australe) Scientific name: Idiotropiscis australe Waite & Hale, 1921 The Southern little pipehorse (Idiotropiscis australe) is a marine fish of the family Syngnathidae. Native range: Eastern Indian Ocean, South and Western Australia. BiologyFound on the continental shelf. Males may have developed brood pouches at about 4.5 cm TL. Ovoviviparous.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameIdiotropiscis australeFamilySyngnathidae (Pipefishes and seahorses)OrderSyngnathiformes (Pipefishes and Seahorses)ClassActinopterygii (Ray-finned fishes)Maximum length5.5EnvironmentMarine; demersalClimateSubtropicalDistributionEastern Indian Ocean: South and Western Australia.Conservation status (IUCN)Data deficient (DD)Threat 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