We have seen ‘Diving bell’ in school text books. It was used then to dive into water. Using its principle, a spider lives under water! It is the Diving Spider or the Water Spider (Argyroneta aquatica). This spider forms a bubble of air around itself when it is on the surface of water. Then it dives down into the water lying inside this bubble that is held by the hairs of its abdomen and legs. It gets its oxygen supply from the air inside this bubble. Occasionally it goes up to the surface of water to renew its air supply!
This spider is a wonder in Nature as it demonstrates to us a principle of diving in Physical science.
