Underwater

The Spotted Trunkfish is part of a family known as boxfishes.  They have a hard outer covering of hexagonal plate-like scales shaped like a box.  Their eyes, snout and fins stick out from their hard outer covering.  This hard shell also accounts for their unusual movement in the water - all the action comes from their fins and tail while their body remains still.   Grand Cayman.

Hammerhead sharks have special sensors that run under their wide heads which allow them to pick up on electrical signals sent out by other living creatures. This makes them tricky to photograph as they will avoid the bubbles that scuba regulators create when a diver exhales.  Although I could often see more sharks than I could count, to get a close up like this, I had to hide behind rock formations for a shark to come close enough.  Darwin Island, Galapagos.