Bostockia
1 species
The nightfish (Bostockia porosa) is a species of freshwater ray-finned fish, a temperate perch from the family Percichthyidae which is endemic to southwestern Australia.
The nightfish is endemic to the coastal wetlands of Southwest Australia. It is common and is found between the Hill River, near Jurien Bay and the Kalgan River near Albany.
The nightfish is found in coastal streams, lakes and ponds where they occur in both clear and dark water, with the latter darkened by tannins. They prefer to be in the vicinity of the cover of rocks, macrophytes or submerged wood. During the day they hide beneath stones or among vegetation. The adults remain hidden in the daylight hours and emerge to feed at night while the juveniles are more diurnal. Males attain sexual maturity after a year and females after two years, when the water levels rise in the winter rains in August and September they migrate upstream to headwaters and tributaries to breed. Each female can lay 230 to 1138 eggs. This is a carnivorous species which feeds on a variety benthic invertebrates, especially ostracods and fly larvae. They have a lifespan of 6 years.
The nightfish (Bostockia porosa) is a species of freshwater ray-finned fish, a temperate perch from the family Percichthyidae which is endemic to southwestern Australia.
The nightfish is endemic to the coastal wetlands of Southwest Australia. It is common and is found between the Hill River, near Jurien Bay and the Kalgan River near Albany.
The nightfish is found in coastal streams, lakes and ponds where they occur in both clear and dark water, with the latter darkened by tannins. They prefer to be in the vicinity of the cover of rocks, macrophytes or submerged wood. During the day they hide beneath stones or among vegetation. The adults remain hidden in the daylight hours and emerge to feed at night while the juveniles are more diurnal. Males attain sexual maturity after a year and females after two years, when the water levels rise in the winter rains in August and September they migrate upstream to headwaters and tributaries to breed. Each female can lay 230 to 1138 eggs. This is a carnivorous species which feeds on a variety benthic invertebrates, especially ostracods and fly larvae. They have a lifespan of 6 years.
