Chaetopoda

Chaetopoda is a subclass of segmented worms within the phylum Annelida, characterized by the presence of bristle-like structures called chaetae on each body segment. These marine and freshwater worms, such as earthworms and polychaetes, have elongated, cylindrical bodies divided into repeating segments, allowing flexibility and movement. The chaetae help them anchor or grip surfaces as they move through soil or water. Chaetopoda play important roles in ecosystems by aerating soil, recycling nutrients, and serving as food for other animals. They exhibit a range of lifestyles, from burrowing and scavenging to filter-feeding, demonstrating significant diversity within this group.