Dead fish

[Laurence reynolds]

 Anyone seen this before? I transferred 50 tilapia from my friends tank to mine. These three didn't make the trip, and the next morning when I fished them out, this is what I found. Looks like their stomachs were eaten out. I have a couple goldfish that may be the culprits, but I'm not sure. Dead fish

[George]

Eaten for sure.  My bluegill ate the tail off one of their fellows, once.  

[Gary Wong]

Goldfish are omnivouros, but I doubt they did that.  I'd guess other tilapia before guesing goldfish, if they were indeed eaten by other fish.