HomeFish encyclopediaRay-finned fishesSticklebacks and SeamothsSand eelTubenose Tubenose (Aulichthys japonicus) Scientific name: Aulichthys japonicus Brevoort, 1862 The Tubenose (Aulichthys japonicus) is a marine fish of the family Hypoptychidae. Native range: Northwest Pacific, northern Japan and the eastern Korean Peninsula. BiologyFound in vegetated shallow waters. Spawning occurs in early summer. The eggs are laid in the peribranchial cavity of an ascidian.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAulichthys japonicusFamilyHypoptychidae (Sand eel)OrderGasterosteiformes (Sticklebacks and Seamoths)ClassActinopterygii (Ray-finned fishes)Maximum length12.8EnvironmentMarine; benthopelagicClimateTemperateDistributionNorthwest Pacific: northern Japan and the eastern Korean Peninsula.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Assuming Fec SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026