1
the live in the sea. Their body is covered by hard plates.
2
the have their body covered by articulated shells
3
they live in the sea and they have a soft body and tentacles.
4
they have a soft body and nearly all of them have shells
6
ara the simplest invertebrates. they can\'t move and they live in the sea.
7
live in groups
8
they have a long body and they live in the land or sea
