HomeFish encyclopediaRay-finned fishesPerch-like fishBillfishesSixgill sawshark Sixgill sawshark (Pliotrema warreni) Scientific name: Pliotrema warreni Regan, 1906 The Sixgill sawshark (Pliotrema warreni) is a marine fish of the family Istiophoridae. Native range: Western Indian Ocean, off Madagascar and from southern Mozambique to Cape Agulhas, South Africa. BiologyFound on the continental shelf and upper slope to at least 430 m. Feeds on bony fish, also shrimp, mysids and squid. Ovoviviparous, with 5 to 7 young in a litter. Probably uses its saw to stun and kill prey. Sometimes caught by sports anglers.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePliotrema warreniFamilyIstiophoridae (Billfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length170Depth range60–430 m (197–1411 ft)EnvironmentMarine; demersal; depth range 60 - 430 m, usually 60 - ? mClimateSubtropicalDistributionWestern Indian Ocean: off Madagascar and from southern Mozambique to Cape Agulhas, South Africa.Conservation status (IUCN)Near Threatened (NT)Threat to humansHarmlessUsesFisheries: of no interest; gamefish: yesResilienceVery Low, minimum population doubling time more than 14 years (Fec=5) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026