Sea snails are generally omnivorous. They eat algae and sometimes feed on smaller snails as well. Some species, such as the cone snail, are predatory sea snails. Smaller cone snails tend to eat marine works, while larger ones can prey on live fish.
Marine snails are often colorful, and they have intricately shaped shells. Some species live near warm tropical reeds, while others scavenge at the bottom of the sea. Conch shells, often used to hear the so-called sound of the sea, are actually home to larger snails. The marine geographic cone snail is an aggressive hunter. It can deliver a lethal venom to protect itself that is enough to kill human beings.