Definition: An oligochaete worm is a type of worm that belongs to a group called annelids. These worms can live both on land (terrestrial) and in water (aquatic). They have a body that is long and soft, and they have small bristles (called setae) that are found one by one along their body.
In scientific studies, you might encounter the term "oligochaete" used as an adjective: - "The oligochaete population in this river is crucial for maintaining water quality."
Oligochaete worms are important creatures in our environment, helping to improve soil and water quality.