Squid, commonly known as clams, toadfish, sea toads, anglerfish, etc., generally live in the depths of the seabed 500 to 5000 meters below sea level. It is a bony fish, a squid order, and a trout

Squid, commonly known as clams, toadfish, sea toads, anglerfish, etc., generally live in the depths of the seabed 500 to 5000 meters below sea level. It is a teleost fish, in the order Troutidae, in the family Troutidae, and is a carnivorous fish in the offshore bottom. It is widely distributed in the Indian, Pacific and Atlantic Oceans, and is also found in the Arctic Ocean, and is produced off the coast of China.

Above the head of the trout there is a fleshy protrusion, shaped like a small lantern, which is formed by the gradual upward extension of the first dorsal fin of the trout. The reason why the small lantern emits light is because it has glandular cells in the lantern that can secrete photons, which emit light by slow chemical oxidation with oxygen under the catalysis of photonase. Many fish in the deep sea have phototropism, so the small lantern becomes a weapon for the trout to lure food.