An Oceanographer is a person who maps out the ocean. Someone who studies the ocean would be called a marine bioligist.
An Aquanaut!
marine biologist
a marine biologist or oceanographer
Oceaneure
Jacques Cousteau, Hans Hass, Llyod Bridges, Stan Waterman, all were famous underwater explorers.
A person who explores relics is often called an archaeologist or a relic hunter. They study ancient artifacts, historical sites, and other remnants of past civilizations to understand and learn about the history and culture of those societies.
Forest Explorer
I dont know what you call 5 blondes underwater.
With a tube = Snorkling With an air tank = SCUBA With a tube and metal helment = Hard Hat Diving.
An underwater technician would be a person who was capable of fixing things underwater.
A vessel that travels underwater is termed a submarine.
seamount
A "marine biologist", or more specifically a "marine botanist" (plants).
they call it ocean graphers
Echogram
Wet Phoenix