Salmon
are
an
____________________
fish
.
But
when
it
is
time
to
lay
eggs
,
salmon
must
swim
up
a
swift
river
.
They
cannot
rest
.
On
and
on
they
swim
to
the
spot
____________________
they
lay
their
eggs
.
Afterwards
,
the
salmon
cannot
get
back
to
the
ocean
.
They
lose
all
of
____________________
strength
.
The
river
____________________
their
grave
.
