The Cone snail has a two eyes but mainly hunts by scent. The Cone snail has a siphon which it uses to both smell for prey and to breath while it is buried under the sand. The Cone snail also has a harpoon which comes out of a tube, called a proboscis, that can extend more then twice the size of the snail. It is able to fire out using a contraction of muscles, the harpoon is venomous and stuns or even kills its prey. The cone snail also has a mouth that is able to expand large enough to swallow animals bigger then itself whole, the mouth is the brought back using muscles to close and make the mouth smaller.