What is a "water beetle"?

A water beetle is a type of beetle that is specially adapted to living in aquatic environments such as ponds, lakes, and streams. It has a streamlined body shape and often possesses specialized legs or other appendages for swimming. Water beetles are skilled predators and feed on various aquatic organisms, including insects, small fish, and amphibians. They play an essential role in the ecosystem as predators and decomposers, contributing to the nutrient cycling in aquatic habitats.