Jacques Cousteau, Hans Hass, Llyod Bridges, Stan Waterman, all were famous underwater explorers.
An Oceanographer is a person who maps out the ocean. Someone who studies the ocean would be called a marine bioligist.
I dont know what you call 5 blondes underwater.
A person who explores the world is commonly referred to as a traveler or an adventurer.
A vessel that travels underwater is termed a submarine.
seamount
underwater photographer is someone who takes pictures of the marine life underwater and around the waters edge.
Forest Explorer
they call it ocean graphers
Echogram
Wet Phoenix
A submarine.
Sumerrain