Amphibians and reptiles of Washington State: Location data and predicted distributions. Volume 2 in Washington State Gap Analysis - Final Report, (K. M. Cassidy, C. E. Grue, M. R. Smith and K. M. Dvornich, eds.), Washington Cooperative Fish and Wildlife Research Unit, University of Washington, Seattle.
Shark found in the Ohio River at Manchester, OH. Early. speculation was that it was a bull shark was incorrect. Now identified. as being an Atlantic Sharpnose. - pic credit: Ledger Independent.
But bull sharks can adapt their osmoregulatory processes to survive in a broad range of water salinities, from the salt water of the ocean to the fresh water of a lake. In the organism, the external environment and the internal environment of the organism are separated by a membrane across which substances can move.