I have a divided 10 gal. On the side with the mystery tracks have one male plakat betta, one zebra nerite snail, and several MTS. I'm just stunned by the sheer volume of "tracks" that are decorating my tank just above the waterline. I'm thinking the nerite, I have heard they can be escape artists. IS this a bad sign? I have never seen anything above water where some of the marks have been made. This is just one of those things that has peaked my curiosity.
The number of trails and tracks has easily tripled since this picture was taken.