HomeFish encyclopediaSharks and RaysBramble, Sleeper and Dogfish sharksSleeper sharksTaillight shark Taillight shark (Euprotomicroides zantedeschia) Scientific name: Euprotomicroides zantedeschia Hulley & Penrith, 1966 The Taillight shark (Euprotomicroides zantedeschia) is a marine fish of the family Dalatiidae. Native range: Southeast Atlantic, off Cape Town, South Africa. Southwest Atlantic: off Uruguay and Argentina. BiologyDorsal spines: 0; Dorsal soft rays: 0; Anal spines: 0; Anal soft rays: 0. A small, compressed dogfish shark with a blunt snout, ear-shaped pectoral fins, and gill slits increasing greatly in width from front to back; cloaca area with a large luminous gland not found in other sharks. Brown with black underparts; fin margins conspicuously white.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEuprotomicroides zantedeschiaFamilyDalatiidae (Sleeper sharks)OrderSqualiformes (Bramble, Sleeper and Dogfish sharks)ClassElasmobranchii (Sharks and Rays)Maximum length42.0Depth range195–205 m (640–673 ft)EnvironmentMarine; benthopelagic; depth range 195 - 205 mClimateSubtropicalDistributionSoutheast Atlantic: off Cape Town, South Africa. Southwest Atlantic: off Uruguay and Argentina.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessUsesFisheries: of no interestResilienceLow, minimum population doubling time 4.5 - 14 years (Fec assumed to be SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026