A shark bent on mischief can usually be spotted at first glance by his jerky, nervous swimming, which is not at all like his usual demeanor, full of grace and indifference. But the great majority of sharks are timid, frightened by a man’s sudden movement (except perhaps the very big ones . . .). I was among them so often, spearfishing at Mauritius, that swimming with 2500 fathoms under the keel does not bother me at all, providing I stay on the alert, ready to climb out quickly.
