''Gyrinus aeratus'' is a species of

whirligig beetle The whirligig beetles are water beetles, comprising the family Gyrinidae, that usually swim on the surface of the water if undisturbed, though they swim underwater when threatened. They get their common name from their habit of swimming rapidly ...

in the family

Gyrinidae The whirligig beetles are water beetles, comprising the family Gyrinidae, that usually swim on the surface of the water if undisturbed, though they swim underwater when threatened. They get their common name from their habit of swimming rapidly ...

. It is found in North America and Europe.

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Further reading