There are 4 periods, each lasting anywhere from 4 to 10 minutes, depending on the level of the players.
They're called periods. Four periods make up a game of water polo.
the quarters are about 6 to 7 minutes long
Polo
It varies. Arena polo has 4 7 minute periods called Chukkas
4
2
there can be as many as you want.
12.8 meters. It depends on the Olympic water polo pool it is.
there can be as many as you want.
One. Derrr.
at least 7
6 subsitutes