Meet Jack, the original terror of my 40 gallon. KIA sometime today before dinner. Let me say there is no other bully in the tank except him and all other fish are alive with no spots, dark flesh areas, missing sections of fins or anything. Prior to his death, the only bothersome things in the 40 g is a pair of banded shrimp who fight him for space and food sometimes. Could they be the culprits? He has been thru copper about a month ago and had no issues eating or behavior.