General characteristics of phylum Annelida:
∙ (Annelus: little ring)
∙ Habitat: Mostly aquatic, some are terrestrial
∙ Symmetry: Bilateral symmetry
∙ Coelom: Coelomate (Body cavity is a true coelom)
∙ Body is metamerically segmented and the presence of rings is observed.
∙ Germ layer: Triploblastic
∙ Excretion: Nephridia