What is it called when a person uses a diving mask , snorkel and fins , to swim through a body of water ?
[[ File : AnnotatedOctopushPlayer.png | left | thumb | 200px | Annotated Player 1. snorkel and mouthguard 2. hat with earguards 3. mask 4. fins 5. stick 6. puck 7. glovePlayers wear a diving mask , snorkel and fins , and carry in one hand a short stick for playing the puck .