or slow flowing freshwaters where there are rocky, muddy or gravel substrates. Biology The bullrout is a rather sedentary species in which individuals spend most of the time lying in wait on the bottom or among weeds for prey to pass, it is an ambush predator feeding on fishes and small crustaceans. They are known to migrate downstream in rivers during periods of heavy rainfall. They breed in freshwater and juveniles have been recorded from the upper reaches of rivers, upstream from barriers. Danger to humans and first aid The dorsal, anal, and pelvic spines on a bullrout have venom glands on them, and should be handled with extreme care. References External links Fishes of Australia : Notesthes robusta Tetraroginae Venomous fish Marine fish of Eastern Australia Fish described in 1903 Taxa named by Albert Günther