HomeFish encyclopediaRay-finned fishesSmeltsSlickheadsBordello slickhead Bordello slickhead (Rouleina guentheri) Scientific name: Rouleina guentheri Alcock, 1892 The Bordello slickhead (Rouleina guentheri) is a marine fish of the family Alepocephalidae. Native range: Indo-Pacific, including the East China Sea. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 18-20; Anal spines: 0; Anal soft rays: 16 - 20. Body with wrinkled gelatinous skin covering. Small photopores on body. Closely resembles R. watasei but differs in having a gently curved and long snout. Body color dusky-purple.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameRouleina guentheriFamilyAlepocephalidae (Slickheads)OrderOsmeriformes (Smelts)ClassActinopterygii (Ray-finned fishes)Maximum length23.0Depth range500–1300 m (1640–4265 ft)EnvironmentMarine; bathypelagic; depth range 500 - 1300 mClimateDeep-waterDistributionIndo-Pacific: including the East China Sea.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (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