The process of evolution, (that is natural selection of the fittest) does that for them.
Over time the snails have evolved. this evolution developed structures of the snails body so that it could live under water i.e. a siphon to obtain air without having to leave the safety of water, gills, water vascular system for circulation of oxygen.
due to evolution, that's why we are related to many other types of animals around the world. if we didn't have bones, we would probably look like snails.
Apple snails are freshwater aquatic snails. Garden snails are land snails.Apple snails have lungs and gillsGarden snails have lungs onlyApple snails skin is thin and translucent (with slime)Garden snails skin is thick and leathery (with slime)All apple snails have two sets of antennaeGarden snails have species with one and two sets.
water snails but not regular snails
Sea snails Freshwater snails
Apple Snails will eat other snails if you don't feed them. If you feed them, then they are alright.
Snails do not have bristles. Snails do have a raspy tongue though.
no snails are not harmful.
Snails are invertebrates. :)
snails are hervibores?
There may be more than 50,000 species of snails in the world, and each of these species are of three basic types, land snails, sea snails, and freshwater snails.Some types of snails include the Roman snail, the garden snail, and the giant African land snail. There are thousands of species of snails.