Teng's Aquatic Products Business Network - Contemporary Aquatic Products Magazine Exclusive Report:
Recently, some netizens bought a sea crucian carp, and when they returned home, they found that the fish belly was very drummed, and when they opened the fish belly, they found that they were "hiding" 30 small fish. This makes a group of netizens dumbfounded, whether the sea crucian carp is "eating" the small fish, or "pregnant" the small fish, and even some people suspect that this is the "trick" of the merchant to increase weight, what is going on? Today, let Xiaobian take you to crack the mystery of "sea crucian carp belly 'hiding' 30 small fish" and explore the origin of the matter.
"Sea crucian carp with Rokko in my arms"
Sea crucian carp is a species of sea crucian carp in the suborder Sea crucian carp of the order Rayfin fish, Chinese scientific name sea crucian carp, also known as "sea knife", "nine nine fish", "ringgit". Distributed in the eastern Pacific Region, from Fort Bragg, California, USA to the central waters of the Gulf of California, Mexico, the habitat depth can reach 46 meters, the body length can reach 39 cm, mainly living in the rocky sea area where seagrass grows, it is carnivorous, the living habits are unknown, and the fetus is born.
The breeding method of sea crucian carp is fetal, and the female's uterus is divided into multiple chambers, and each litter can produce 30 to 50 small fish. After understanding the breeding method of sea crucian carp, do you think that the phenomenon of "sea crucian carp belly 'hiding' 30 small fish" is no longer strange, and all doubts are solved?
In fact, compared with higher vertebrates, fish have a variety of reproductive methods, not only oviparous, fetal and oviparous, but also parthenogenesis, female nuclear development and heterozygous development. In addition to sea crucian carp, there are many fish babies in nature that are also born from the belly of the fish mother, and today Xiaobian will take you to know these fish that reproduce in the way of birth.
"Peacock fish that "eats juvenile fish""
Peacock fish, a tropical fish of the genus Medaka, is an omnivorous small fish species with a short lifespan. Native to Venezuela, Guyana, the West Indies, northern Brazil and other places in South America, it was introduced to Asia, Oceania and the Pacific, Europe, North and South America. It has strong environmental adaptability and is distributed in the lower reaches of rivers and rivers in some tropical areas, as well as in lakes and ditches. Fetal births can be given every four weeks, and 20-40 juveniles per litter during pregnancies of four to six weeks. Neither parent will take care of the juveniles, and will even eat their own juveniles.
"The 'umbilical cord disappeared' of the Eletian medaka"
The Elijah is a species of ray-finned carp in the suborder Cyperaceae, a tropical freshwater fish found in the Nayarit Basin of Mexico in Central America, with a body length of up to 6 cm, inhabiting the bottom middle waters, with unknown living habits, and can be used as an ornamental fish. It is a rare fetal fish, the female after fertilization embryos develop in the ovary about 5 weeks after production, the embryo and the mother have a nutritional link like the mammalian umbilical cord, for the unborn baby fish to absorb nutrients from the mother, which can be observed during 2 to 4 weeks after fertilization, but disappears when the young fish are born.
"The "Big Head" Du Father Fish"
Dufu fish, also known as bighead fish, sawfish, belongs to the family Dufu fish in the order Scorpiote. It is a small group of fish found in both saltwater and freshwater, and mainly inhabits the northern hemisphere. The head of the fish is large and flat, gradually becoming smaller towards the tail, and the thorax is larger, like a fan. The epidermis usually does not have fish scales. It is only 8 cm long and less than 1 cm wide, and is translucent throughout. The female is excreted during the breeding season by juveniles that can move freely to prey. It generally inhabits the bottom of the water and does not like to be active, mostly living in shallow sea areas, but some live in deeper oceans. Meat does not taste good, has little edible value, and is generally used as bait for catching lobsters and feeding valuable salmon.
"Molly fish that is easy to produce"
Morleys belong to the tropical fish of the family Medaka, omnivorous, and viviparous. After entering the sexual maturity period, almost every 35 days or so, you can produce a baby fish, because the Molly fish is an oviparous fish, that is, in vivo insemination, to be fertilized eggs mature, it will directly produce baby fish, the number of Mori fish produced depends on the size of the female fish, generally with the growth and development of the female fish and increase, the number of 40-100 fish range.
"The Hammerhead Shark with Extraordinary Eyes"
Hammerhead sharks, also known as hammerhead sharks, are a collective name for sharks and hammerhead sharks. The head has two protrusions on the left and right, each with an eye and a nostril, and the two eyes are 1 meter apart. By swinging their heads back and forth, hammerhead sharks can see what is happening within a 360-degree range around them. Adults can grow up to 3.7 to 4.3 meters long. Migratory fish, distributed in hot and temperate oceans. The eggs are born, and the eggs hatch into small sharks inside the female hammerhead sharks.
"Crane-billed fish" for mosquito control
Cranefish, also known as half-jawed fish, is produced in Singapore, The Indonesian island of Sumatra, and Thailand. The fish is 5–7 cm long, up to 10 cm in the wild, with a slender cylindrical body and straight dorsal to the tail stalk. It prefers animal feed and live bait, and also eats small insects such as flies. The eggs are born, and the broodstock will also eat the litters, and the litters should be bred and produced using the isolation method. Females can produce 50-60 calves at a time, often hundreds of them.
The fish listed by the editor that rely on birth and reproduction are only the tip of the iceberg in the magical phenomena of nature, and more mysteries in nature are still waiting for us to discover.
1. Author | Editorial department collation
2. Source | Teng's Aquatic Products Business Network - Contemporary Aquatic Products Magazine
3. This article is the exclusive original manuscript of Contemporary Aquatic Products - Teng's Aquatic Products Business Network, and unauthorized reproduction is prohibited!