Johnny Rotten (John Lydon) would be a red tailed shark or a Malawi eyebiter- a mean spirited contrarian. You'd better hope those good looking cacatuoides you've raised have a more sociable way to them.
Btw - orange flash and double/triple red morphs of cacatuoides have the genetics for colour throughout the fins, but it often comes in pale yellow. That can be diet, and mine were very responsive to foods high in astaxanthin algae. The corporate fish farms skip that and use hormones before sales to light them up, but you can bring up the reds and oranges with astaxanthin based colour foods. I assume the wild fish they were bred from, who only have patches of red on the fins, have access to something in the diet that makes those patches really vivid. When I got to keep red cacatuoides from Peru, they were strikingly red.
