First of all, it is edible. It belongs to a kind of deep-sea fish and is also rich in nutrition. It contains a lot of dha, which is helpful for the development of brain intelligence, but the effect is actually quite good.
Opium fish head, in fact, its real name is toothfish. Because its meat is delicious and its mouth is tender, you will miss it twice as long as you eat it once, and its name is the homonym of opium, so many people gradually forget its real name and only know that it is called crow fish (this kind of fish rarely sees its body and mainly eats its head).