HomeFish encyclopediaRay-finned fishesPerch-like fishEmperors or scavengersBlue-lined large-eye bream Blue-lined large-eye bream (Gymnocranius grandoculis) Scientific name: Gymnocranius grandoculis Valenciennes, 1830 The Blue-lined large-eye bream (Gymnocranius grandoculis) is a marine fish of the family Lethrinidae. BiologyDorsal spines (total): 10; Dorsal soft rays (total): 10; Anal spines: 3; Anal soft rays: 10. Horizontal blue lines on the snout are distinctive. Forehead profile is moderately steep. Large adults develop a bony ridge on the nape and a bony shelf over the front part of the eye. The inner surface of the pectoral fin axil without scales. Overall color is silvery with thin brown scale margins. The anterior half of the head is often brown with a series of narrow undulating, longitudinal lines on the cheek and side of the snout. Fins are yellow or orange; caudal fin is frequently dusky brown; a narrow brown bar across the base of pectoral fins. Juveniles under about 25 cm SL often with 5 or 6 dark bars on the side and a dark bar below the eye.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameGymnocranius grandoculisFamilyLethrinidae (Emperors or scavengers)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length80.0Common length64.0Depth range20–170 m (66–558 ft)EnvironmentMarine; reef-associated; non-migratory; depth range 20 - 170 mClimateTropicalDistributionIndo-Pacific: East Africa to southeastern Oceania and from Australia northward to Japan. This species has been referred to as Gymnocranius robinsoni in recent literature.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (K=0.23) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026