HomeFish encyclopediaRay-finned fishesSmeltsBarreleyes or spookfishesMirrorbelly Mirrorbelly (Opisthoproctus grimaldii) Scientific name: Opisthoproctus grimaldii Zugmayer, 1911 The Mirrorbelly (Opisthoproctus grimaldii) is a marine fish of the family Opisthoproctidae. Native range: Eastern Atlantic, mainly in the tropical region. Northwest Atlantic and western Pacific: subtropical region. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 14-17; Anal spines: 0; Anal soft rays: 8 - 9. Dorsal part of head transparent, ventral part and ventral 2/3 of body peppered with large melanophores; ventral surface of rear part of sole with 4 dark blotches. Body deep and anal fin on a vertical at posterior end of the sole, short based, rays directed posteriorly.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOpisthoproctus grimaldiiFamilyOpisthoproctidae (Barreleyes or spookfishes)OrderOsmeriformes (Smelts)ClassActinopterygii (Ray-finned fishes)Maximum length8.0Depth range0–4750 m (0–15584 ft)EnvironmentMarine; bathypelagic; depth range 0 - 4750 m, usually 300 - 400 mClimateDeep-waterDistributionEastern Atlantic: mainly in the tropical region. Northwest Atlantic and western Pacific: subtropical region.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interest SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026