Gyrinidae, commonly known as whirligig beetles, are a family of aquatic insects that are well-known for their unique swimming behavior. They can swim extremely fast and perform incredible acrobatics, thanks to their flattened bodies and paddle-like legs. However, if you're looking for synonyms for this word, you might also come across names like water beetle or diving beetle. These insects are found worldwide in freshwater habitats and are known for their ability to dive underwater and withstand strong currents. They are important bio-indicators of water quality, and their presence or absence can indicate the overall health of an aquatic ecosystem.