Nightfish
Bostockia porosa
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Quick Facts
Scientific name
Bostockia porosa
Other names
Western Cod
Size
Up to 15 cm (5.9 in)
Weight
Up to 25 grams
Distribution
Habitat & AU Distribution
Freshwater habitats, wetlands, streams, lakes, ponds & dams amongst rocky areas, wood debris & vegetation
Depth Range
0 - 3 m (12 ft)
Interesting Info
- The Nightfish is widespread in south-west Western Australia from the Hill River near Jurien Bay, to the Kalgan River near Albany.
- The Nightfish lives in freshwater rivers, swamps and lakes around plants, wood and rocks structures. It hides in these areas during the day and becomes active at night.
- They have a large mouth, broad head, and a mottled pattern of green, brown, and black on its body.
- The Nightfish are carnivores that prey on various bottom-dwelling creatures, with a preference for small crustacean and insect larvae.
- This species spawns in small tributaries in August and September after winter rains when freshwater discharge is high and temperatures and daylight length increases.
- Maturity for males happens after their first year and females after their second.
- Estimates on lifespan are around 6 years.
Species Interaction
Aquarium Fish
Nightfish can be a fascinating species to keep in an aquarium, their care requirements and predatory nature may make them more suitable for experienced hobbyists who are up for a challenge.
Scientific Classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Percichthyidae
Genus: Bostockia
Species: Bostockia porosa
Conservation Status
Nightfish has a conservation status of “Least Concern” on the International Union for Conservation of Nature (IUCN) Red List.
Nightfish
As Aquarium Fish
Care Level: Difficult
Temperament: Very Aggressive
Diet: Carnivore
Reef Compatible: No
Minimum Tank Size: 50 gallons
