HomeFish encyclopediaRay-finned fishesPerch-like fishTemperate perchesNightfish Nightfish (Bostockia porosa) Scientific name: Bostockia porosa Castelnau, 1873 The Nightfish (Bostockia porosa) is a freshwater fish of the family Percichthyidae. In the aquarium it needs water at 10–25°C (50–77°F). Native range: Oceania, between Albany district and Moore River in Australia. Nightfish care at a glanceTemperature10–25°C (50–77°F) BiologyOccur in coastal streams, lakes and ponds. Inhabit clear or darkly tannin-stained water of rivers, streams, swamps and lakes, usually near the cover of rocks, aquatic plants or woody debris. Cryptic during the day under stones or among vegetation, but actively feeding at night on various crustaceans, small fishes, aquatic insects and gastropods. Migrate to spawn in small side creeks after winter rains (August and September). Males reach maturity after their first year, female after their second. Maximum life span is about six years.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameBostockia porosaFamilyPercichthyidae (Temperate perches)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length15.0Common length9.0EnvironmentFreshwater; demersal; potamodromousClimateTemperateDistributionOceania: between Albany district and Moore River in Australia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (tmax=6; tm=1; K=0.67; Fec=230) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026