They are all soft-bodied.
bilateral symmetry
They are all soft-bodied.
They are all soft-bodied.
They are all soft-bodied.
foot
they are slick slop and slimy
bilateral symmetry
They have shells.
It would seem so... mollusks have been found near deep sea vents as well as in high altitude mountain ponds (up to 10,000 feet above sea level).
external skeleton
23000
Not all vertebrates have tails.
its says on the top