diving beetle
Water Boatman is an aquatic bug that can be found in fresh or brackish water. They have oarlike hind legs fringed with hairs that help them to swim.
so that we can shave them
Not exactly, but they do have long, wide hind feet that are fringed with stiff hairs and have bald soles with webbing between the digits.
cause you dont have a head
yes.
Yes.
yes they have tiny millimeter hairs on their legs.
yes. they hear by using the hairs on their legs.
They are like feelers on snails
Yep amount varies
hairs to grab uneven edges
The hairs on a spider's legs are used primarily to smell. Spiders don't have ears, noses or taste buds, so they rely on these hairs to sense their surroundings, if something is moving nearby, and if something is edible. These hairs are called thrichobotria.