HomeFish encyclopediaRay-finned fishesPerch-like fishLanternbellies, temperate ocean-bassesKeelcheek bass Keelcheek bass (Synagrops spinosus) Scientific name: Synagrops spinosus Schultz, 1940 The Keelcheek bass (Synagrops spinosus) is a marine fish of the family Acropomatidae. Native range: Western Atlantic, Canada North Carolina, the Gulf of Mexico, Caribbean Sea to Uruguay and Brazil (ISH specimens). Western Pacific: Japan and near Hainan, China. BiologyDorsal spines (total): 10; Dorsal soft rays (total): 9; Anal spines: 2; Anal soft rays: 7 - 8; Vertebrae: 25. Anterior edges of pelvic spine, and 2nd spines of 1st dorsal and of anal fin serrated, but that of 2nd dorsal smooth.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSynagrops spinosusFamilyAcropomatidae (Lanternbellies, temperate ocean-basses)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length13.0Common length10.1Depth range87–544 m (285–1785 ft)EnvironmentMarine; bathydemersal; depth range 87 - 544 m, usually 300 - 500 mClimateDeep-waterDistributionWestern Atlantic: Canada North Carolina, the Gulf of Mexico, Caribbean Sea to Uruguay and Brazil (ISH specimens). Western Pacific: Japan and near Hainan, China.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Assuming tmax>3) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026