The largest shark alive today, reaching up to 20 meters long, ... A species called the salmon shark can maintain a body temperature that's 20° C warmer than the sub-Arctic waters that it occupies.

Porbeagle Shark (Lamna nasus) The world-record porbeagle shark was caught off the coast of Scotland in 1993. Porbeagles, sometimes called salmon sharks, herring sharks, or bonito sharks, live in ...