Last Updated：2025/12/29
Sentence
The
chimeras
[…]
are
an
extant
group
of
about
30
species.
They
have
the
upper
jaw
fused
with
the
cranium
and
a
gill
cover
over
the
four
gill
slits.
They
also
have
toothy
plates
that
give
them
a
ratlike
appearance,
thus
the
common
name
"ratfish."
The
group
occurs
in
ocean
depths
worldwide,
where
they
mainly
feed
on
invertebrates.
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The chimeras […] are an extant group of about 30 species. They have the upper jaw fused with the cranium and a gill cover over the four gill slits. They also have toothy plates that give them a ratlike appearance, thus the common name ratfish.
The group occurs in ocean depths worldwide, where they mainly feed on invertebrates.
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