Where are whirlpools mostly located?
Whirlpools usually form by or near the shore.
yes and no. little whirlpools like the ones in a sink when you drain the water won't suck you down but big whirlpools also called maelstroms can suck you down. but big whirlpools can't sink a big ships like in some movies. if you want to know how a whirlpool is formed its formed when two different currents pass each other.
Technically, there is no such thing as an underwater tornado. By definition a tornado is a violently rotating column of air. A vortex underwater is called a whirlpool. Whirlpools are not like tornadoes, however. They are not nearly as violent and are usually harmless, though some stronger whirlpools can pose a threat to swimmers and small boats. Natural whirlpools can be observed in streams and at some tidal inlets.