There are a large number of sports that involve water.
The following is a List of water sports, divided by category. These categories are based on the relation of the sports to the water. Some of the sports include only one part related to swimming, as for example Triathlon.
A water slide is a slide with water flowing down it
Under water
Scuba diving is swimming under water using a (self contained) breathing apparatus
Free-diving is the aim to maximize the depth dived using no breathing apparatus
Underwater hockey is hockey played under water with short wooden curved sticks and a heavy puck. Players wear diving masks, snorkels, and fins, and must surface to breathe while team mates continue the game on the pool bottom.
Underwater rugby is rugby played under water. Two teams try to score goals by sending a slightly negatively buoyant ball into the opponents' goal, which is situated on the bottom of the pool.