What is "bottom-feeder"?

Bottom-feeder refers to a type of fish that feeds primarily on the sediment at the bottom of a body of water. These fish are often found in freshwater or saltwater habitats and have a flattened body shape that allows them to easily move along the bottom. Examples of bottom feeders include catfish, carp, and flounder. These fish are important for maintaining the health of aquatic ecosystems as they help to clean up debris and other organic matter that has settled on the bottom. However, some bottom-feeders may also accumulate harmful toxins or pollutants from the sediment, making them potentially hazardous to human consumption.