Gurnard
Gurnard, which is known as the sea robin in many countries, is a perky-looking fish with a large armoured head, two wings, six "legs" and two colour options: grey or bright red. It also makes a grunting noise, which is pretty cool (see/hear it here, although this is a Hawaiian gurnard). Gurnard has firm white flesh with no special distinctions of taste - just good, mild, fishy fish. There are no sustainability issues so it's been popular in recent years with celebrity chefs.