I knew you were a bait fisherman! I bet you lauched that poor thing into the brushpads looking for monster bass
Frogs can be surprisingly aggressive. I watched a dude 'fishing' for frogs (for the legs...) with bass gear. He'd flip a rubber weedless frog (like for bass) into the brushweedspads, and strip it and the big frogs would chase it down and munch it.
I was fishing Dry Falls about 15 years ago when my buddy yelled look at that water snake. I looked and said cool !! It then swam over to my Quigly Cripple and you guessed it !! It ate it. I was the talk of my fishing buddies for at least a couple of years !!