While snorkelling off the coast of India a diver was able to close the shells of giant clams by blowing horizontal bubble rings. <br /><br />The video, filmed on April 29, shows the diver being able to blow out the bubble rings towards the clams, triggering their reflex instincts to shut when threatened.<br /><br />The filmer commented: "This is completely useless and takes some time to learn. It is fun though."
