All  seven photographs were taken at

Seven Mile Beach,

Grand Cayman Island.

Equipment:

Nikon D70S camera.

Subal underwater housing with dome port.

No flash.

Nikon DX AF Fisheye 10.5mm lens.  This allows the wide aperture required to freeze fast moving water while still maintaining simultaneous close-up and distant focus.

Settings:

Photo 1 : F13  

Speed 1/640    ISO 400

Photo 2 : F11 

Speed 1/500    ISO 400

Photo 3 : F11 

Speed 1/500    ISO 400

Photo 4 : F13 

Speed 1/640    ISO 400

Photo 5 :  F5.6

Speed 1/1250   ISO 400

Photo 6 : F5.6 

Speed 1/1600   ISO 400

Photo 7 : F5.6 

Speed 1/1250   ISO 400