Are you sure he was dead? Did you try to revive him. Maybe a jolt from a 9V battery would have brought him back
Next question...what actually killed him...was it the impact that did it, or did the impact knock him unconcious and then he drowned...I would put in a call to CSI...something sounds fishy ...HAH...fishy...get it FISHY! Bah..forget it lol
Never heard of that before, I have a freshwater pictus catfish that spooks easily and I believe he has jumped and bounced off the canopy before, but he's a tough old fish.