You call him a diver.
A person who explores under the sea is commonly referred to as an "underwater explorer" or "marine explorer." In more specialized contexts, they may also be called a "diver," particularly if they are using scuba gear, or an "oceanographer" if their exploration is scientific in nature. Additionally, those who operate submersibles or underwater vehicles may be known as "submersible pilots" or "submersible operators."
National Geographic Explorer - 1985 Underwater Photography 1-1 was released on: USA: 7 April 1985
It is very difficult to paint underwater. You need special paper and paint to do so.
Underwater Spelunking
Yes, some snails can survive underwater by breathing through their skin or using a special breathing tube.
Without special equipment they do not.
Amerigo Vespucci was the explorer .
he can control water , and breathe underwater
MYGHFN28
Speleologist
A submarine
Type your answer here... he was a underwater bathesphere explorer. made it to the bottom of the Marianis trench 36000 ft