HomeFish encyclopediaRay-finned fishesEels and MoraysCutthroat eelsBruun's cutthroat Bruun's cutthroat (Histiobranchus bruuni) Scientific name: Histiobranchus bruuni Castle, 1964 The Bruun's cutthroat (Histiobranchus bruuni) is a marine fish of the family Synaphobranchidae. In the aquarium it needs water at 1–2°C (34–36°F). Native range: Southwest Pacific, Tasman Sea and off southeastern New Zealand. Bruun's cutthroat care at a glanceTemperature1–2°C (34–36°F) BiologyDorsal soft rays (total): 347; Anal soft rays: 214 - 251; Vertebrae: 162 - 163. Upper limit of dorsal fin rays is 408; dorsal fin rays before anus 136-166; precaudal vertebrae 86-88. Pectorals small.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHistiobranchus bruuniFamilySynaphobranchidae (Cutthroat eels)OrderAnguilliformes (Eels and Morays)ClassActinopterygii (Ray-finned fishes)Maximum length69.0Depth range3493–4974 m (11460–16319 ft)EnvironmentMarine; benthopelagic; depth range 3493 - 4974 mClimateDeep-waterDistributionSouthwest Pacific: Tasman Sea and off southeastern New Zealand.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