Thanks, hopefully I have more, I haven’t seen this guy or anymore since, but they could be in there somewherethe snail in the OPs picture is a MTS not a bladder snail. great at detritus cleanup and a awesome help in keeping slow growing plants free of algae on their leaves. populations are a great indicator of the feeding level of a tank. they also are great for keeping substrate stirred.View attachment 1431666View attachment 1431667