To be sure, there is no more bleak animal than the trout in the deep sea.
In the endless black waters of up to 3 kilometers deep, the trout dragged a fragile body to the bottom of the sea motionless, muscle atrophy, only the paper-thin black skin with some luminous bacteria accompanying.
They will constantly turn on and off the light source on their bodies, hoping to tempt other creatures in the darkness to get as close to their huge mouths as possible.
In his lifetime, the trout seems to have nothing but to wait, and each time the waiting is often as long as several months.
There are about 300 species of squid, including toadfish, frogfish, batfish and so on. A notable common feature is the often soft rod-like structure growing in the center of the head to attract prey.
The top of the "fishing rod" is a protrusion where the bait is placed, and when it swings, it is like a live bait. It grows with bacteria that, through a chemical reaction, can control the bait of the deep sea to emit light. In return, the trout provides food for bacteria.
Different species of squid have different shapes of bait, which were originally thought to attract different prey, but now indicate that they attract the same kind of prey. This difference can be a sexual show-off: the larger, softer, and brighter the bait for the head. The stronger the attraction to the opposite sex.
The trout in the deep sea is one of the ugliest and most peculiar creatures on Earth.
Their stomachs are very elastic and they are able to swallow prey that is twice as large as their own body. It has a layer of light-proof inner membrane in its body, so that it will not cause confusion of light when swallowing a glowing fish.
They have a row of upside-down teeth in their mouths, and the same teeth have a row in the pharynx, which prevents prey swallowed in their mouths from escaping.
The female bearded fish looks like a fluorescent vegetable root, with a black bulb-shaped body and a series of flashing baits on the top of her head that resemble psychedelic leaves, and its Latin name means "tree-shaped toad that can fish with a net."
▲ Tree whisker fish
The filament-stemmed horned trout's large, prickly fins look decaying, its body is covered with a nasty layer of gray hairs, its bait is like a worn licorice branch, and it has a more sensitive line measurement than other fish, and the slightest movement can trigger the opening and closing of its mouth.
▲ Polyfilament-stemmed horned trout
The giant spiny horned catfish is upside down, dragging its bait up and down the ocean floor alone.
▲ Dense spiny horned trout
The crayfish, commonly known as the "pocket of the hairy jaw", has a bait with three flashing "fishing hooks" at the end, which is thrown forward like fishing in the way of a false fly.
▲ Hairy-jawed trout
The bait of prince Axel's long-jawed dreamfish hangs from the upper jaw of the mouth like a pair of fluorescent tonsils.
▲ Prince Axel's long-jawed dreamfish
Males in the deep sea are much smaller than females and have no bait. Male trout are only keen on mating and have no interest in predation. It searches for suitable females with its large eyes and sniffs the female's pheromones with its huge nostrils.
Once it finds the target, it will use its teeth to firmly adhere to the female's body, but its own body begins to slowly disappear: scales, bones, blood vessels, etc. are all integrated into the female's body.
After a few weeks, all that remains on the male's body is the seminal vesicles hanging on the side of the female's body to supply the female with sperm. Female trout with 8 seminal vesicles hanging from the side of the body have been found.
In some species, if the male does not absorb into the female's body, it will eventually turn itself into a female trout and become very large. As people usually say when commenting on the trout: There is only one thing that is scarier for the trout than being a trout, and that is to be a male trout.