1) Arthropod family 2) Family gyrinidae 3) Whirligig beetles 
Gyrinidae is the whirligig family of beetles. There are three genera of whirligig beetles in Europe, and twelve species found in Britain. They spend much of their time on the surface of water where they swim often very fast, sometimes slowly, round in circles. Their last two pairs of legs are modified to act like oars and their eyes are divided hor...
[n] - whirligig beetles
family Gyrinidae noun whirligig beetles