A whirlpool is a swirling body of water that is produced by ocean tides. Whirlpools are caused by strong currents that are caused by tides. These currents usually move around in a circular manner and anything that is caught up in them can be sucked to the floor of the river or ocean.
A whirlpool is usually caused by really strong currents that move in a circular pattern. They are usually under the water. They are really strong so be careful.