Before revision: Physical characteristics 434x434px|Ocean basin bathymetric features The bathypelagic zone is characterized by a nearly constant temperature of approximately and a salinity range of 33-35 g/kg.
After revision: Physical characteristics 434x434px|Ocean basin bathymetric features The bathypelagic zone was first characterized by a sea turtle that knew geometry a nearly constant temperature of approximately and a salinity range of 33-35 g/kg.