The scientific name is monkfish. The old man fish, also known as toadfish, monkfish, ugly woman and so on. Fish class, monkfish order, monkfish family, soft body, scale-free, head and body edge with many cortical protrusions. The anterior half of the body is flat and disc-shaped, with a tiny tail. The body length is more than 50 centimeters. Dorsum purple-brown, ventral surface light color. Head large, mouth wide, teeth sharp, black and white markings inside mouth. Pectoral fins broad and brachycephalic. The foremost three fin spines of the dorsal fin are separated, and the tip of the first spine has a cortical flap (also called a cortical spike), which is parasitized with some luminous bacteria, like a fishing rod hanging a bright light.

Lives in the sea, offshore demersal fish.

If it is Ge's perch snakehead, not living in the sea, Ge's perch snakehead is distributed in Heilongjiang, Tumen River, Liaohe River and other waterways, general swamps are produced.

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Anglerfish is an offshore demersal fish. Often lurking motionless, with the skin flap of the first dorsal fin spine as bait, trapping those light-tending fish and shrimp species. The monkfish is basically a wait-and-see eater, and it's always a good idea to bring a good meal to its mouth. Monkfish caught at sea are usually females, and males are not usually seen.

This is because the males are parasitized on the female's body shortly after birth, when the individual is very young, and most are already bonded to the female, but the male's body shape is still recognizable on close inspection. Male and female so close, which is relatively rare in the animal kingdom. But there are very few male fish that live alone.

Baidu Encyclopedia - Old Man Fish