Triad Forum

Waterball is very similar to Terran Water Polo.  It is played in a bay,
cove or lake.  There are boundaries to the playing field that are more
often agreed upon than marked (thus they can be fudged on a bit, with
the exception being no action behind the net, period).  It is played
with an inflated ball and two floating nets on either side of the
playing "field" which are tied down to rocks at the bottom to assure
they won't float away.

Start:
The game starts with both teams line up on their side of the "field".
One team throws the ball off to the other team and play begins.

Scoring:
A team scores a goal when they can get the ball passed the goalie and
defenders and into the opposing team's net.  They can do this any way
they like: throwing (most effective), swimming it straight in, or
pushing it in.  For getting he ball into the net area, they score one
point.  After a point is scored, the scoring team tosses the ball to the
opposing team (much like at the start of the game).

End of the Game:

The game ends when one team reaches the agreed upon score, OR when the agreed upon time has elapsed.  The team with the most points wins.

Other rules:

No biting, scratching, intentional grabbing/touching of personal parts
or punching.  Anything else, short of drowning or causing personal
damage, is legal.  What happens under the water cannot be determined
effectively, so basically under the water line, anything goes (aside
from the afore mentioned which generally leave marks and can be
determined).