Annelids

Annelid phylum is composed of wide segmented worms, with about 15,000 modern species, such as earthworms and leeches. These phyla are found in most wet environments, such as freshwater and at sea. The length of membership ranging from under one millimeter to three meters. Phyla are grouped into three classes, namely Polychaeta, Oligochaeta, and Hirudenia.