HomeFish encyclopediaRay-finned fishesPerch-like fishPorgiesSt. Helena white seabream St. Helena white seabream (Diplodus sargus helenae) Scientific name: Diplodus sargus helenae Sauvage, 1879 The St. Helena white seabream (Diplodus sargus helenae) is a marine fish of the family Sparidae. Native range: Southeast Atlantic, endemic to Saint Helena. BiologyInhabits rocky bottoms of the continental shelf. Forms small schools. Is a minor constituent of the local fishery and is considered a fair table fish locally.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameDiplodus sargus helenaeFamilySparidae (Porgies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length31.0Common length20.0EnvironmentMarine; benthopelagic, usually 5 - 15 mClimateTropicalDistributionSoutheast Atlantic: endemic to Saint Helena.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