See, I knew something was up with that lion eating the tang that size... I'm putting money on the idea that something else is up... Hmmm.... aren't lions able to excrete toxins into the water column if stressed??? The toxin is definitely potent enough in a closed system like an aquarium to cause severe trauma or death to tankmates... You did say that the battle to remove him from QT was epic right? lol. Perhaps he got stressed to the point where he released toxins into the water with his move into the new tank with new fish. That would explain how the fish died off one by one (except the one you saw literally get swallowed), and the CUC got each of them.... any thoughts anyone??