Why Rob?
I only feed my pets either a super premium pelletized food or human-consumption grade natural food. This is a habit that I picked up many moons ago when I was still young and impressionable and decided to buy my first German shepherd.
The bait quality fish here obviously don't meet that criteria.
There is very likely nothing wrong with them and I'm sure many people feed them with great success. However, as I've said here and elsewhere, I like to err on the side of caution when it comes to my pets.