Starfish
,
sometimes
____________________
sea
stars
,
are
found
in
all
of
the
world's
oceans
,
even
in
the
icy
Arctic
Ocean
.
They
are
a
kind
of
ocean
invertebrate
,
which
means
they
lack
____________________
.
All
starfish
have
at
least
____________________
arms
,
but
some
have
more
.
Many
kinds
of
starfish
can
re
-
grow
____________________
that
are
bitten
off
by
predators
.
Starfish
can
be
dull
or
colorful
and
come
in
many
different
sizes
.
Scientists
____________________
there
are
____________________
than
1
,
500
types
of
starfish
.
Starfish
attack
and
eat
other
invertebrates
.
Some
starfish
,
however
,
are
harmful
to
undersea
communities
because
they
eat
special
kinds
of
coral
or
fish
.
Starfish
are
rarely
eaten
by
humans
because
their
bodies
are
bony
and
taste
____________________
.
Humans
often
use
them
as
____________________
or
collectibles
.
