Characteristics features of Phylum - Annelida are :
1. They have a long and segmented body.
2. They are bilaterally symmetrical in nature.
3. They are triploblastic.
4. Their body is covered with a thin cuticle.
5. They are coelomated body.
6. They live in moist environments, moist soil, freshwater and marine water.
7. Fertilization can be internal or external.
8. Examples of Annelids are Earthworm and Leeches