Definition
Annelida is a large phylum of segmented worms, also known as ringed worms. These worms have bodies divided into repeating segments, both internally and externally. Annelids can be found in marine, freshwater, and terrestrial environments. This phylum includes familiar creatures like earthworms, leeches, and various marine worms. They play important roles in soil aeration, nutrient cycling, and aquatic food webs. Think of them as nature's recyclers and aerators!