Some sharks do need to keep swimming to stay alive, but not all. Like other fish, sharks extract oxygen by passing water over their gills, says Ellen Husain. Many of the larger, faster species use ram ...

Found this big Wobbegong in a cave while spearfishing in Australia at 15 meters. Just for fun i tried to see if he was hungry, he was! #fishing #hunting #freediving #shark #spearfishing ...