HomeFish encyclopediaRay-finned fishesVelifers, Tube-eyes and RibbonfishesRibbonfishesTaper-tail ribbonfish Taper-tail ribbonfish (Zu elongatus) Scientific name: Zu elongatus Heemstra & Kannemeyer, 1984 The Taper-tail ribbonfish (Zu elongatus) is a marine fish of the family Trachipteridae. Native range: Southeast Atlantic, Namibia and off the western Cape coast, South Africa. Southwest Pacific: New Zealand. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 142-147. Adult specimens preserved in alcohol are tan in color; front of head with triangular dark area extending onto lips and gular region; posterior dorsal rays black; caudal fin black, base of fin pale.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameZu elongatusFamilyTrachipteridae (Ribbonfishes)OrderLampriformes (Velifers, Tube-eyes and Ribbonfishes)ClassActinopterygii (Ray-finned fishes)Maximum length120EnvironmentMarine; bathypelagicClimateDeep-waterDistributionSoutheast Atlantic: Namibia and off the western Cape coast, South Africa. Southwest Pacific: New Zealand.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 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