Some invertebrates have soft bodies, some have a shell and other have a hard outer covering to their bodies.
They can live in the water, undrground, in a tree trunk or in the body of another animal.
GROUPS OF INVERTEBRATES
The most important groups of invertebrates are:
- Annelids have a long softy body, divided into segments. They have no protective covering. Earth worms are annelids.
- Molluscs have a soft body, covered with a shell. Snails are molluscs.
- Arthropods have a hard outer covering, or exoskeleton.