John G.,
Yes, every fall I catch a bunch of them before the die-off. The good eating ones from my ponds are those that have access to artificial feed. They taste great, but the ones I've taken from ponds without artificial feeders and hence which offer only algae and such as natural food for the Tilapia are virtually not suitable for eating.
Right now, I'm catching small Tilapia for overwintering and have about 70 such fish in my tanks so far.
