HomeFish encyclopediaRay-finned fishesPerch-like fishSea chubsOpaleye Opaleye (Girella nigricans) Scientific name: Girella nigricans Ayres, 1860 The Opaleye (Girella nigricans) is a marine fish of the family Kyphosidae. In the aquarium it needs water at 33°C (91°F). Native range: Eastern Central Pacific, San Francisco in California, USA to southern Baja California, Mexico. Opaleye care at a glanceTemperature33°C (91°F) BiologyA resident intertidal species with homing behavior. Can leave tide pools if aquatic conditions become inhospitable. Also found near or over rocks and in kelp beds up to about 30 m depth. Feed mainly on seaweed, occasionally takes invertebrates. Form dense schools in spring in kelp beds. Pelagic spawner. Breathe air when out of water. Considered an important game fish and may incidentally be caught in commercial fishing activities. Marketed fresh.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameGirella nigricansFamilyKyphosidae (Sea chubs)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length66.0Depth range2–30 m (7–98 ft)EnvironmentMarine; benthopelagic; non-migratory; depth range 2 - 30 m, usually 2 - 6 mClimateSubtropicalDistributionEastern Central Pacific: San Francisco in California, USA to southern Baja California, Mexico.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: commercial; gamefish: yesResilienceMedium, minimum population doubling time 1.4 - 4.4 years (tm=2.5; tmax=10) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026