They are all soft-bodied.
They are all soft-bodied.
They are all soft-bodied.
All mollusks exhibit bilateral symmetry, meaning their body can be divided into two mirror-image halves along one plane. While some mollusks, such as bivalves, have hinged shells, this trait is not universal among all mollusks. Radial symmetry and the ability to swim are also not characteristics found in all mollusks. Thus, bilateral symmetry is the defining feature present in all members of this diverse phylum.
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).
Vertebral column is not present in all mollusks.
external skeleton
23000
Not all vertebrates have tails.