Cone snails are famous for having cona toxins thee special toxins they use to kill their prey. They can, in mill seconds, m shoot out the spear into fish, polyket worms or other mollusks. Please note that not all snails are created and it really depends on how you prepare them. Never eat a raw snail or a raw slug. Ever. Two words, rat, lung worm. Is that enough? It should be. But what if they are cooked and they're safe? Mike mankowski,. great question. Is farming helix snails for escargo an environmentally sustainable form of agriculture.