I was looking at my pike the other day when i notice his body had a bump/gut. It seemed to have a neon blueish red look at his belly area trailing to the anus, but for sure he did not eat any cardinal tetra, i have counted them 10 times since, and my brother has too. For sure he did not eat any, they dont fit in his mouth, so i know he didn't eat any fish as the rest are accounted for. So y is it this color, and y a lump, also notice irredecent red on sometimes his pectoral or tail fins, but neither at the same time. He seems to just rest every so often.