Water Strider, common name applied to slender water bug that is a predator on other insects. It lives on the surface of quiet waters-some species are adapted for life on faster-moving streams-and darts about with great rapidity, using the middle pair of legs as paddles and the hind pair for steering. The front pair of legs is adapted for grasping prey. Fine, dense hairs on the feet keep the insect from breaking the water's surface film. One genus of water striders is marine.
Scientific classification: Water striders belong to the family Gerridae, of the order Hemiptera.