In the dark deep sea, there lives a terrible-looking fish- the trout. It has a huge mouth full of fangs, but as a fish, it is not very good at swimming, and it will hardly take the initiative to prey, but will quietly lie on the bottom of the sea to "wait for the rabbit".
Perhaps it is inefficient and boring to wait completely for predation, so the sturgeon has the strange ability to "fish". And its fishing technique is really good, and it doesn't use bait... Some people may be curious, but they have eaten sturgeon, but they really don't know that it will fish? So let's move on.
Sturgeon, Chinese scientific name of the trout, is a collective name for 25 species of fish in 4 genera under the family Troutidae, it has many aliases, such as: anglerfish, toadfish, stuttering, etc., I don't know what you call it there?
The sturgeon lives on the dark seabed of about 500-1000 meters in the Pacific, Indian and Atlantic Oceans, with a large head, a disk-like body and a short tail, and can use two arm fins to crawl underwater.
When the sturgeon unfurled its arm fins, it looks like the legendary UFO, which adds more mystery to it. There are no scales on the body of the sturgeon, and there are many small bumps on the body and head, which are their cortical protrusions, which are definitely the nightmares of dense fearers.
The sturgeon has the ability to fish because of the unique structure of its body. Usually the top of the head of the catfish has at least one tentacle-like filament, which grows from the extension of the spines of the dorsal fin.
The tentacle-like filament protrudes above the fish's eye, and irregular meat drops grow at the ends of the filaments called bait. (Note: This description applies only to female sturgeon)
The sturgeon can wiggle the bait, and some of it emits light (usually yellow, yellow-green, blue-green, lilac, and orange), which makes it look like a small living bug, attracting potential predators closer. When the attracted predators are close enough, the sturgeon will swallow them whole in their mouths.
The diet of the trout includes crustaceans and other teleost fish, with the predominance of the long-fronted shrimp family. What's worse is that the trout's stomach can expand, which makes it swallow prey its own size without freshness.
Do you also have such a question: fishing in this way, what if you attract big fish, you will not be eaten? Although this method of sturgeon rarely attracts the attention of big fish, it is not completely absent.
If it accidentally attracts large enough fish to prey on itself, the trout will hold the bait in its mouth and escape, which is especially effective for squid with glowing bait. How do you think it is this fishing technique?
The body length of the sturgeon is generally 20-30 cm, and individual species can exceed 150 cm, such as the current aquaculture production of the largest fishing sturgeon, which can grow to about 2 meters, and the maximum weight can exceed 50 kg. Another feature of the sturgeon is that the male and female body size differences greatly, and the male is generally more than ten times smaller than the female.
The reason for this difference in body size is related to their most extreme breeding methods! If you've seen Junji Ito's Tomie, you've seen what "Siamese" looks like. During the breeding season, most species of male sturgeon will bite the female with sharp teeth.
Over time, the male's body fuses with the female, losing major organs such as eyes and internal organs, leaving only the reproductive system. From then on they became eternal parasitic partners, and sometimes a female would carry six or more males, a form of reproduction known as "symbiotic reproduction."
Here's a question: Why do male sturgeon do this?
In fact, the reason seems to us to be quite pitiful, especially men may feel angry when they see it, because they are born with "little white faces".
In the species of symbiosis-dependent symbiosis, males remain underdeveloped after birth, unable to survive independently, and will die if female attachment is not found as soon as possible. Some species of male sturgeon are too small to find food in the deep sea. There are also some males whose digestive tracts are underdeveloped and unable to eat. In addition, there are some males whose jaws are not completely unsuitable or unable to effectively catch prey, etc.
As a result of all this, for a long time, researchers have been wondering, "Why are all the females caught?" The tiny males attached to the females were treated as a nasty parasite in the deep sea. I wonder if it is the saddest male animal in nature?