I noticed that when i took out their cave and put it back in,for a few days they would sit anywhere in the tank and then go back in so i do that every couple of weeks but now hes in the big tank hes just sat next to a log at the front lol.
i doubt they would do that,they dont have very big mouths and ive never seen this big lad bother anything in the growout tank he was in when i took the pics,i chose these as they dont get as big as the nigers.