Bites

[Roberta]

How recently was that particular plant potted? Bush snails (teensy little snails) tend to hide in the medium, may exist as eggs for a long time before emerging. Catching them in the act is difficult, they hide during the day. But being little, they can't take big bites - they tend to take the surface tissue of leaves. They are hard to eliminate - because they live in damp medium, even snail baits (which partially work by dessication) don't work very well, If this plant hasn't been repotted recently, repot after cleaning off as much of the old medium as you can without destroying roots.