Knowra Bull shark Bull shark The bull shark (Carcharhinus leucas) is a large coastal shark that tolerates freshwater and travels far up rivers. Its broad build and adaptable osmoregulation suit it to both marine and freshwater habitats.
Osmoregulation : The regulation of water and dissolved substances in an organism. Bull sharks adjust internal salt and water balance as they move between habitats of different salinity.
Brisbane River : A river in Queensland, Australia, that flows through Brisbane into Moreton Bay. Bull sharks inhabit this river system and can travel far inland from the coast.
Carcharhinus : A genus of requiem sharks that includes many coastal and oceanic species. The bull shark is one member of this diverse shark genus.
Tiger shark : A large predatory shark, Galeocerdo cuvier, recognized by dark vertical bars on juveniles. Both use warm coastal waters, but tiger sharks are less known for extensive freshwater travel.
Shark migration : The seasonal or long-distance movement of sharks between habitats. Tracking is needed to distinguish local bull shark movements from broader migrations.
Urea : A nitrogen-containing compound used by many sharks to help balance body fluids with seawater. Bull sharks alter urea retention as salinity changes, helping maintain osmotic balance.
Lake Nicaragua : A large freshwater lake in Nicaragua connected to the Caribbean Sea by the San Juan River. Bull sharks were long associated with the lake, whose river connection allows movement to and from the sea.
Requiem shark : A family of active sharks, Carcharhinidae, common in warm seas and coastal waters. Bull sharks belong to this family of mostly live-bearing sharks.
Great white shark : A large predatory shark, Carcharodon carcharias, found in temperate and subtropical seas. Its marine range contrasts with the bull shark’s regular use of freshwater.
Shark conservation : The protection and management of shark species and their habitats. Bull shark population trends and fishing pressures vary across their broad range.
Show all 26