ive only had my sleeper a few weeks but hes never tried to jump out
in most cases fish leap to their doom usually out of fear. something usually spooks them...of course im not a fish so i cant speak for them
my large oscar just jumped to his death a few nights ago. he was being bothered everynight by a large catfish, not attacked just bumbed up against while he was sleeping, this was enough to send him into a panic, and this big 10" fish managed to get out of a 2" hole
i found him crispy the next morning
i think i should have mounted him, he was well presereved
