my female motoro stung my male leo in the mouth when he was trying to mate with her, and i waited for 2 weeks to see if it would fall out.... it ended up going in more eventualy i took a pair of tongs and just held them in the tank and he figured out after me trying to grab it twice what i was doing and when i was holding the tongs a foot above the bottem of the tank he went on top of it and waited for me to pull it out