The cholesterol-containing super-protein — taurine bomb, low fat, and a high-mercury context.
low-mercury
The freshwater omega-3 source — low mercury, high vitamin D, and the wild/farmed conversation.
The "intermediate" lean fish — high protein, low fat, and the Icelandic-Norwegian gastronomic tradition.
The delicate-fleshed flat fish — low mercury, high selenium, and the classic of Mediterranean cuisines.