I used to catch a lot of small Watts Bar Smallmouth with that same problem. DNR says it's either a genetic defect, or possibly a survived injury from predator birds or fish. They were so prevalent that we nicknamed them "humpies".
And what do we have lying about, there in your boat ?? I see a few jigs, bottle of juice, rod handle, what appears to be a rod holder base lying loose on the carpet, and what's that other thingy there -- is that a TV REMOTE ?? ...LOL!! Hey, they have DVD/TV's in vehicles ... why not boats ? :D ..............cp