Squid is commonly known as beetle, toad fish, sea toad, angler fish, etc., generally 20 to 30 cm long, the largest trout up to 120 cm, black trout up to 50 cm.
The trout is a deep-sea fish with a very peculiar appearance. The body is short and conical, the head is large and flattened, the mouth is flat and wide, its edges have a row of sharp teeth with a tip inwards, the eyes are long on the back of the head, and the body is soft and scaleless.
The trout looks very bulky, and is not usually active, good at swimming and chasing food. However, it is an excellent fishing expert. It has a fleshy protrusion above its head, shaped like a small lantern, formed by the gradual upward extension of the first dorsal fin of the sturgeon. Biology calls this little lantern a bait. The small lantern is formed by the gradual upward extension of the first dorsal fin of the sturgeon. The front end resembles a fishing rod, and the end expands to form a "bait". When the gluttonous little fish are just about to eat the "bait" on the "fishing rod", the cunning fish open their mouths, and the small fish are swallowed into the belly of the fish along with the current. Its large mouth and inflatable stomach are able to swallow fish as large as it does.
It usually lives on the deep seabed of 500 to 1000 meters, and when it spawns, it will move to shallow sea areas. It lives on the offshore bottom and is widely distributed in the Indian, Pacific and Atlantic Oceans, as well as in the Arctic Ocean, where it is found off the coast of China. Because of its ugly body shape, it is known as an ugly fish in Shandong. And because it sounds like an old man coughing, it is called an old man fish along the coast of Hebei.
The trout has a big appetite, and its stomach is often filled with sharks and so on. It grows in the depths of the dark sea, slow movement, and unsociable life, in the vast ocean male fish is difficult to find female fish, once encountered with female fish, it will be attached to death for life, the male fish lifelong nutrition is also provided by the female fish. Over time, the trout formed this unique mate relationship.