diver
scuba diver, lifeguard, underwater recovery, underwater conscruction, professional swimmer.
It is completely possible to cry underwater. Because tears are comprised mostly of water, it would be impossible to see them on a swimmer's face while they were underwater.
a snorkeler. Or they could be an underwater hockey player.
Before starting shooting "H2O" she was not; she worked to improve her swimming skills, but due to the fact she played a mermaid in the production and had to shoot lots of scenes underwater, we can assume she's a pretty good swimmer.
Diving does not consist of two separate words together, so it is not a compound word.
That term is tsunami.
In Washington State, all motor-propelled vessels must be equipped with An effective muffler or underwater exhaust system.
This term means that you are a good swimmer, fish can stride through the water and therfore the swimmer is good.
Gentoo penguins has a maximum speed of 36 kph and can dive up to 170 m. They are the fastest swimmer of penguin's underwater specie.
An underwater research vehicle is a type of vehicle designed to operate underwater and gather data for scientific research or exploration purposes. These vehicles are equipped with various sensors and tools to collect information about the underwater environment, such as water temperature, pressure, and marine life. They can be remotely operated or unmanned autonomous vehicles.
Such formations are called seamounts.