This video by National Geographic shows a side to snails we rarely see up close.
The cone snail in this video hunts for food by using its poisonous harpoon-like tooth. The tooth can be propelled from a proboscis that extends from the snail body. The snail hunts by burying itself in the sand, waiting for a fish to swim close by and then firing its harpoon from below the sand. It then reels in the fish and swallows it whole. The cone snail lives in warm, tropical waters and all of the species are venomous. The snail in this video is the most venomous of the known cone snail species, according to National Geographic.