Underwater Hockey, as its name suggests, is a team sport where players push a puck along the bottom of a pool with the goal of scoring at their opposing teams end. Players wear snorkel gear and come up for air at timed intervals.
Below you will find links to the Results & Tables of competitions in Ireland:

[12] Contributor: Dhodi Syailendra (2022) Underwater Hockey Tournament Item ID: 1044602905 [Internet] Available from: https://www.shutterstock.com/image-photo/underwater-hockey-tournament-1044602905 [Accessed 20 February 2022][Adjusted]
Underwater Hockey
Underwater Hockey
Underwater Hockey Ireland
Champions 2018-19: DCU Sea Lions/Vikings
UWI Irish League (Results): 2017-18

[12] Contributor: Dhodi Syailendra (2022) Underwater Hockey Tournament Item ID: 1044602905 [Internet] Available from: https://www.shutterstock.com/image-photo/underwater-hockey-tournament-1044602905 [Accessed 20 February 2022][Adjusted]
Underwater Hockey Teams
Underwater Hockey
Underwater Hockey Ireland Teams
IUWHL Champions: 2018-19