HomeFish encyclopediaRay-finned fishesPipefishes and SeahorsesPipefishes and seahorsesSydney's pygmy pipehorse Sydney's pygmy pipehorse (Idiotropiscis lumnitzeri) Scientific name: Idiotropiscis lumnitzeri Kuiter, 2004 The Sydney's pygmy pipehorse (Idiotropiscis lumnitzeri) is a marine fish of the family Syngnathidae. Native range: Southwestern Pacific, known from the Sydney region (Clovelly, Cronulla and Botany Bay) and Jervis Bay. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 15-16. Superior trunk and tail ridges discontinuous; rings 11 + 43-44; subdorsal rings 2.5 + 1.5; head length 86-91% of trunk length, and angled ventrad approximately 25? from longitudinal axis of body; trunk length 18-20% TL; snout length 2.2-2.6 in HL; top of head with prominent, tall, frontal ridge. Coloration: white to dark grey wit brown to red blotches or irregular banding; sometimes uniformly burgundy-red. Fleshy appendages mostly red with grey branches or tips.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameIdiotropiscis lumnitzeriFamilySyngnathidae (Pipefishes and seahorses)OrderSyngnathiformes (Pipefishes and Seahorses)ClassActinopterygii (Ray-finned fishes)Maximum length5.5Depth range6–30 m (20–98 ft)EnvironmentMarine; reef-associated; non-migratory; depth range 6 - 30 mClimateSubtropicalDistributionSouthwestern Pacific: known from the Sydney region (Clovelly, Cronulla and Botany Bay) and Jervis Bay.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