They do not bother healthy plants, unless they are quite starvedFingers crossed that my Mystery Snails don't start eating my plants... I will keep a close eye on them, and if there are signs that they are eating plants, I may have to consider re-homing them, sadly. I really hope they don't, as I really enjoy watching them glide around the tank. They are so interesting. I am considering getting some Nerite Snails as well. They don't eat plants do they?