Nereithia (genus of polychaete worms)

Nereithia is a genus of polychaete worms, a diverse group of segmented marine worms found in oceans worldwide. These worms have elongated bodies divided into multiple segments, each often bearing bristle-like structures called setae. They play important roles in their ecosystems by helping to break down organic material and recycle nutrients in the sediment. Nereithia species typically inhabit burrows or live on the seafloor, and they can vary in size and appearance. Their adaptability makes them important indicators of environmental health and ecological stability in marine habitats.