So is there a reason why a snail would climb out of a tank? Or do they just do it because they don’t know better? The first time I was able to pull it off the outside glass but this time I left it alone because he wouldn’t let go of the glass when I tried to pull it off, and I didn’t want to hurt it by pulling too hard. I have a cover on my tank and plastic around the filter to keep my fish from jumping out. But I guess this snail is finding a way out somehow and I have no idea how. Here are pics of the snail and the filter on my tank showing how it is covered. I can’t figure out how it keeps escaping.