 Also dubious records exist of this species from off Cape York Peninsula in the north and Tasmania in the south.This species co-occurs with the related Port Jackson shark ("H. portusjacksoni") across much of its range, but is generally much rarer except off southern Queensland and northern New South Wales, where it tends to replace the other species.Bottom-dwelling in nature, the crested bullhead shark is found over the continental shelf from the intertidal zone to a depth of , being more common in deeper waters.