There
are
a
large
number
of
sports
that
are
related
to
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,
and
there
are
many
more
sports
to
be
added.
Some
of
the
sports
include
only
one
part
related
to
swimming,
as
for
example
Triathlon.
This
system
has
the
disadvantage
that
that
some
sports
may
fit
in
more
than
one
category.
Here
they
are
only
listed
in
one.
Apnea
is
the
practice
of
not
breathing
for
extended
times.
Underwater
rugby
is
rugby
played
under
water
with
a
ball
that
has
been
rendered
neutrally
buoyant.
Surfacing
to
breathe
is
only
allowed
without
the
ball.
Underwater
hockey
is
hockey
played
under
water
with
short
wooden
Y-shaped
sticks
and
a
heavy
puck.
Surfacing
to
breathe
is
only
allowed
when
you
are
not
pushing
the
puck.