1. Monkfish, also known as toad fish, old man fish, ugly fish, etc. Fish class, Ankang order, Ankang family.

2. The body of monkfish is soft and scaleless, with many cortical protrusions on the edges of the head and body. The front half of the body is flat and disc-shaped, and the tail is small. Body length is more than 50 cm. The back is purplish brown and the belly is light colored. The head is big, the mouth is wide, the teeth are sharp, and there are black and white markings in the mouth. The pectoral fins are broad and arm-shaped. The first three spines of the dorsal fin are separated. There is a skin flap (also called a cortical spike) on the top of the first spine. Some luminous bacteria live in the flap. The monkfish has a large mouth with canine-shaped teeth. There is a fishing rod on the top of the head. This fishing rod will emit flashes of stars from time to time to lure small fish. It is like a fishing rod hanging a bright light. Ankang is a bottom fish in the sea. It often lurks and does not move. It uses the flap of the first spine of the dorsal fin as bait to trap light-seeking fish and shrimps. Basically, the angler fish waits for food, and the delicious food is always delivered to its mouth. side.

3. Monkfish caught at sea are usually female fish, and male fish are generally not seen. This is because the male fish parasitizes the body of the female fish shortly after birth, and most of them have become one with the female fish. However, if you look closely, you can still distinguish the shape of the male fish. It is rare in the animal kingdom for a male and a female to be so intimately connected. But there are also very few male fish that live alone. It is said that the male Ankang caught off the coast of Iceland weighed only one thousandth of the female Ankang.

4. Monkfish is distributed in the western North Pacific and is produced along the coast of my country. Other varieties of Ankang include Huang Ankang, which has a yellowish-brown back, white inside the mouth, and no black spots. It is produced in the northern part of the East China Sea, the Yellow Sea and the Bohai Sea. Because monkfish has a large head, small body, heavy internal organs, and low meat yield, it is generally disassembled and processed instead of whole frozen.

There are also glabra bream, dragonhead fish, lampeye fish, bald fish, etc., there are many.

Some sharks can also glow. The light produced by dogfish is an intense green phosphorescence emitted from many light-emitting organs scattered in the skin. There is a shark that can still glow hours after it dies.

Some bony fish have more advanced luminous systems, with rows of luminous balls on both sides of their bodies. There is a kind of lantern-eyed fish in the Indian Ocean. Under the eye, there is a large light-emitting organ on a short movable handle, like a lantern that can be carried back and forth. When not in use, the "light" can be retracted and hidden in a pouch under the eye.

There is also the lantern fish, which has a small number of light-emitting organs, but the light it emits is very strong, like dazzling gems and shining pearls, inlaid on its abdomen.

The fish that lives on the coast of California, USA, has more than 700 luminous points all over its body, emitting white light. Various luminous fish have different luminous groups, different luminous organs, and different colors of light. These fish glow because they have luminescent cells in their bodies, or luminescent cells in their luminophores.

There are many luminous fish in the world. These luminous fish can be divided into two categories, one is "self-luminous fish" and the other is "other luminous fish". ?

The bald fish in the United States is a self-luminous fish. The back of its head is flat and completely covered by a pair of large light emitters, like "searchlights". Bald fish have no eyes, so the light emitters can play a visual role. The bald fish has a unique set of hunting skills, and people call it a "miraculous fisherman". They often hide themselves, wait for the opportunity with their huge mouths open, extend the long threads on their fins and slowly swing them, and the light emitters at the end of the threads look like swimming shrimps. The curious and greedy fish thought it was a delicious meal, so they chased after it. Just as they were about to eat, they realized that they had been deceived and tried to escape before it was too late. Instead, they became a delicious meal for the bald fish. ?

An American biologist once placed the most sensitive photometer 270 meters on the seabed one night and found that the bald fish glowed much brighter than during the day.

The flashing fish in the Red Sea and the Indian Ocean is the "other luminous fish". The flash fish is only seven or eight centimeters long, and the light it emits is also very bright. Divers can see it underwater more than 10 meters away from the fish.

Because the flash of this fish allows divers to see the time on their watches clearly underwater, divers often catch it and put it into a transparent plastic bag for underwater lighting. ?

Flashing fish is also called "light-faced fish" and "light-eyed fish". It has a layer of dark "eyelids" attached to the bottom of the light-emitting organ, like a light switch. It pulls up for a while, covering the light-emitting organ and extinguishing the light; it pulls down again for a while, exposing the light-emitting organ and flashing light. In fact, this fish does not emit light on its own; it is the light emitted by thousands of special bacteria that grow on its head. These bacteria survive by sucking nutrients and oxygen from the fish's blood, and on the other hand, they emit light energy. So the bacteria continue to glow even some time after the flash fish dies.

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