Doubtful a snapper caught the fish. He probably came along and took advantage of the situation after it was killed by the GBH.
Forgive me if I forget but was there a reason you can't put up staked lines to keep the GBH out? Was your pond too big? If so have you considered staking out areas where is he is most likely to get in?
I.e., last year I just staked out an area of shoreline my bluegills bed off of.
Another concern about GBH's, other than just needlessly killing larger fish is they are parasite vectors. All they have to do is stand over the water and the parasites will drop out of their mouths.
GBH's are just doing what comes natural and as you can see he's giving a turtle something to eat. However I can't tolerate it in my ponds due to niche market I supply, make sure they can't feed in my ponds, and have to move on somewhere else.
You're smarter than the bird.
You don't have to take this!
