Many sharks and other fish prefer warm water, but porb
eagle sharks like to stay cool. They inhabit coastal regions and the open sea. Like shortfin mako sharks, porbeagles possess a body heat regulatory mechanism that can raise their temperature several degrees higher than that of the surrounding water. As a result, they function efficiently in the freezing water off the coasts of Iceland and Chile. This stocky shark is often included in studies on whether or not sharks play. That is because several observers have reported seeing porbeagles in groups of up to 20 individuals manipulating and tossing about floating objects, including lumber and seaweed. They seem to engage in such activity for no apparent reason other than to pass the time.
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