Opah (Lampris luna), it Urge- deep-'sea' fish from the North Sea and the Atlantic, constituting a genus of the Acanthopterygian family Cbryphsenidae
The body is deep and compressed from side to side; the tail deeply forked; and the pectorals, ventrals, and the forepart of the dorsal fin falciform. It attains a length of 4 feet, and is brilliantly coloured. The back is bluish-green, the sides violet blending into the red of the under surface, round silvery spots are scattered over the body, and the fins and tail are scarlet. The flesh is reddish, and is said to be excellent in flavour. It is sometimes called the sun-fish (q.v.), and has other local names.