Dusky Dolphin

This is a Dusky Dolphin which grows to be about 6 feet in length and can be regularly found in the waters off Kaikoura.  It associates with a large social group who were very happy to provide entertainment for the swimmers who slipped relatively clumsily off the back of the boat into the sea.

It would appear that although they swim over a wide area and are totally untamed, the dolphins are happy to be regularly visited by the tourists.  This seems to beg the question of who is entertaining whom.  Is it jut possible that they a wondering why homo sapiens keep coming back to provide the entertainment?