The hard shell protects the very soft body of the mollusk.
soft
soft
Mollusk is an invertebrate animal. Some mollusks are covered with shell and some has tentacles. Mollusk are soft-bodied invertebrate animal. Examples are octopus, snail , oyster and clam. -Co0leTs24
soft bodies and a big muscular foot. Some mollusk have shells.
A cat's eye shell has a smooth, rounded shape with a spiral structure that helps protect the soft body of the mollusk inside. The shell also features a wide opening to allow the head and foot of the mollusk to extend out for feeding and movement. Additionally, the glossy appearance and unique patterns on the shell may provide camouflage and protection from predators.
Mollusk comes from the Latin adjective mollis which means "soft"
this is what i know of mollusk: soft bodies (some have shells) true coelum/body cavity - advanced organs bilateral symmetry examples: octopuses, cuttlefish, muscles/clams/oysters muscular FOOT for movement that should definitely answer your question
They are all soft-bodied.
MOLLUSK
Most animals in the Mollusk phylum have bilateral symmetry, where their body can be divided into two equal halves along a single plane. This symmetry allows for more efficient movement and sensory abilities.
Turtles have a shell To protect them from predators also have a shell because its their back bone But its on the outside of its body.