Mocha Dick was most likely first encountered and attacked sometime before 1810 off Mocha Island. His survival of the first encounters coupled with his unusual appearance quickly made him famous among Nantucket whalers. Many captains attempted to hunt him after rounding Cape Horn. Mocha Dick was quite docile, sometimes swimming alongside the ship, but once attacked he retaliated with ferocity and cunning, and was widely feared by harpooners. When agitated he would sound and then breach so aggressively that his entire body would sometimes come completely out of the water.