Ankang fish, a kind of deep-sea fish, they are found all over the world's temperate oceans at depths of 50 to 100 meters, with more than 250 species, belonging to a not-so-small family.

Interestingly, the male and female anacondas are dozens of times different in size, making them a great example of the "woman and the man" in the marine world.

Because when the male fish is born, instead of practicing his predatory skills, he is in the darkness of the deep sea, relying on the female fish to emit a bright light and smell, eagerly looking for his "lifelong partner".

Once they have come across one, the tiny male immediately bites through the skin of the huge female and inserts himself into her soft head or under the spines of her gill covers. Over time, the male's lips and tongue become tightly connected to the female's skin, eventually fusing together.

From then on, the male depends on the female to sustain life, and becomes an appendage on the female.