Earthworms migrate only a limited distance annually on their own, and the spread of invasive worms is increased rapidly by anglers and from worms or their cocoons in the dirt on vehicle tires or footwear. A major invertebrate phylum of the animal kingdom, the annelids number more than 9,000 species distributed among three classes The annelids include earthworms, polychaete worms, and leeches All members of the group are to some extent segmented, in other words, made up of segments that are formed by subdivisions that partially transect the body cavity. Approximately 22,000 species have been described in phylum annelida, which includes polychaete worms (marine annelids with multiple appendages), and clitellates (earthworms and leeches) Some animals in this phylum show parasitic and commensal symbioses with other species in their habitat.
They use their crown for gathering food and oxygen. Arenicolidae is a family of marine polychaete worms They are commonly known as lugworms and the little coils of sand they produce are commonly seen on the beach. Annelids are invertebrate animals characterized by their segmented bodies Approximately 16,500 species have been described in phylum annelida The phylum includes earthworms, polychaete worms, and leeches
