Just bought a st Thomas mushroom at the LFS and noticed a cool hitch hiker no clue if he is safe to go in the tank he is still in the bag for now. It doesn't have a shell on its back bit it does look like its back has something a little harder than its underside here are the best pics I could get hes not super small but definitely not big I would say the size of a dime ??! Maybe.... any help would be nice. I dont want to kill him if he's not a nuisance pest.


