Order Zeiformes(dories). Family Zeidae(Dories) Mirror dory Zenopsis nebulosa(Temminck & Schlegel, 1845). Max length/70cm.cm TL. Max. age/45 years. Korean name/min-dal-go-gi(민달고기) Japanese name/カガミダイ(Kagamidai) Chinese name/雲紋亞海魴(운문아해방), 雨印鲷(우인조) D/spine 9, soft ray 26~27. A/spine 3, soft ray 24~25. P1/13. P2/spine 1, soft ray 5~ 6. Vert/ 12~13+21.
Distribution: Indo-Pacific/all around coasts of Korea, south of Hokkaido Japan, Taiwan, East China Sea, Philippines, Australia, New Zealand and elsewhere in the region. North Pacific/Sand Island, Green Island and Midway Atoll of American territory. Eastern Pacific/off central and southern California, USA, the seamounts of the Nazca Ridge in the Peru area General; Etymology of Mirror dory/The etymology comes from the fact that it resembles an old-fashioned metal mirror, which is almost circular and has a carved pattern around the rim. Has oval shape with deep depth. The body and head compressed laterally. The outline above the eyes is concave and the ventral edge arc-shaped. The mouth is large and located at the end of the long snout, pointing almost vertically upward. The mouth has the function of protruding and expanding far forward. The teeth are well developed, with 7-8 inwardly curved canine teeth at the front of the upper jaw; the lower jaw and vomer also have teeth, but the palatine bone has no teeth. Gill rakers reduced to flat shape.
Dorsal fin single, and the area between spines and soft rays is sunken low. The tips of the membranes of dorsal fin spines are elongated long as thread-like. The forward set of pelvic fin rays are very elongated, rear end reaching behind the origin of anal fin; Anal fin hard spines not elongated as thread. Pectoral fin extremely short. Caudal fin truncated. Large, flat plates with a spine are arranged along the full base of the dorsal fin, ventral ridge between pelvic and anal fins and the base of anal fin. There are 12-14 bony plates at the base of the dorsal fin; 7-9 at the base of the anal fin; and 5-7 on the abdomen. The body is smooth and lacks scales on the body, but small scales exist only on the lateral line. The lateral line is complete, descends sharply at the center of dorsal fin’s spinous region, and goes straight in the caudal peduncle. Lateral line appears as a tubular line.
The body is evenly silvery gray throughout, almost mirror-like brightness. The caudal fin is black. With or without a single, barely discernible, faint round blotch in the center of the body flank. Juveniles have a silvery-white background with several black blotches of varying sizes arranged irregularly on the sides of the body, dorsal fin’s spinous part, tail fin, and pelvic fin are blackish. As they grow, the black blotches fade and decrease in number, eventually leaving only one faint or barely visible blotch in the center of the body.
It lives close to the sea bed between 30 and 800 meters deep. It mainly eats fish. Medium and large fish, occasionally caught by bottom trawl nets, have delicious meat and great food value. It is a relatively cheap fish, and it is difficult to find it in retail stores because it is not caught in large quantities. Large-sized Mirror dory have a superior taste to John Dory. Small ones are very cheap. Larger items are a little more expensive. The skin is thick and strong. Bones are soft. Be careful as there are strong spines around the body.
The body shape of Mirror dory is very similar to that of John dory(Zeus faber), but the differences include a dark blotch in the center of the body is distinct in John dory but faint or barely discernible in Mirror dory, the outline of head above the eye is straight in John dory but slightly concave in Mirror dory, and the different colors each other.
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