The porbeagle shark (Lamna nasus) is a powerful, torpedo-shaped predator found in temperate and cold waters of the North Atlantic, Southern Ocean, and parts of the Southern Hemisphere. A close relative of the salmon and great white shark, it shares their streamlined body, crescent-shaped tail, and endothermic ability to regulate internal body temperature—making it highly efficient in chilly marine environments. Porbeagles are fast swimmers and voracious hunters, preying on squid, mackerel, herring, and other pelagic fish. Though solitary, they are sometimes seen near offshore structures or schooling fish, and have been known to approach divers or boats out of curiosity, though they are not considered dangerous.