Synirr
"No one is a failure unless you try"
Well if it didn't jump, then you my dear have been pranked. There's simply no other way. If you don't believe someone who has access to your fish would move it, then it had to have jumped. You'd be surprised the kind of weird jumps fish can make. If there was so much as a space large enough for that fish to wiggle through, I guarantee you he could wiggle through it.