While keeping an eye out for a pod a ways off and drifting with the wind, I spotted the bright cyan color of some dorsal fins right below me!! I held the camera over the side and started clicking. The calf came up and over out of curiosity and the mother and escort followed in...

The fish eye lens allows you to get very close to the subject and still capture all of it but it makes the subject appear much further away and smaller than it is.