Gyrinidae, commonly known as whirligig beetles, are a family of aquatic insects found in freshwater habitats worldwide. They are easily recognized by their unique swimming behavior, which involves rapid, circular movements on the water's surface. These beetles have a streamlined body and two pairs of eyes, allowing them to see both above and below the water simultaneously. Whirligig beetles primarily feed on small insects and organic matter found in the water. They play a role in the ecosystem by helping to control insect populations and serving as prey for various birds and fish. Their distinctive movements and adaptations make them an interesting subject of study in entomology and ecology.