Not long ago, swarms of Guanbei medaka and mini parrot fish were found in the rivers near Huadi Bay in Guangzhou.
The sturgeon in wild waters
Mini parrot
Look at the medaka on their backs
First of all, these two species are ornamental fish, and their common characteristics are: cheap, viability and easy rearing, with a good ability to tolerate low water temperatures, but the most important thing is that they have a strong reproductive ability.
Of course, these two kinds of fish because of their good appearance and price is not expensive, the past three or four years in the ornamental fish market can be described as quite sought-after, many people will appear in the fish tanks of their figures, especially mini parrots.
After all, its "distant relatives" mosquito-eating fish have been introduced into the country for decades, and it does have a certain effect on controlling the number of mosquitoes in wild waters, and it will not have too much impact on the ecology, so let's leave aside the bad words about the back medaka for the time being.
Mosquito-eating fish
So, let's concentrate on criticizing the mini parrot.
First of all, the mini parrot fish is not wrong, the people who breed this fish are not wrong, and the people who sell and buy fish are even more correct. However, people who release this fish at will are very wrong!
First of all, the mini parrot bought home, after a period of breeding, experienced the breeding pleasure of raising mini parrot fish, but a headache came: the nest of small fish born last month was just able to forage independently, and a new litter was born, and then you will find out, how does this thing grow so fast?
Then there are more and more mini parrot fish in the house... Then, the fish tank at home can't raise so much... What to do? Send these small fish to the aquarium shop to sell? Excited, they went to find that the aquarium shopkeeper told you that they didn't accept it at all, because the mini parrots in their shop were also breeding wildly...
What else can I do? Hanging salted fish on sale? Then found that there are a group of merchants on the idle fish are selling this thing, and the price is extremely low, look at the price, if their own fish in the idle fish to sell but will lose money, because to sell the fish, but also need to buy packed cartons, foam boxes, transport bags and ice bags or warm baby, the last question express station, the first ten pieces, continue to weigh four pieces. Come back to calculate, the weight of the package needs to spend 18 pieces of postage, plus a series of costs such as buying a packing carton, foam box, etc., almost thirty small... And the buyer auctioned the price is 20 yuan ten free shipping and package damage...
Or send a friend, save trouble and worry. But the friends who keep fish around are far less than the cats and dogs... Just a few aquarists, the first time sent out, the second time absolutely can not send out...
Finally, there is really no rudder, get it, release it, the pond in the park, the river downstairs, and even the dirty ring river, can be put ah, after the release, the heart is so happy, finally sent these things away!
However, you are relaxed, but the problem of the environment comes...
Mini parrots have been known to forage normally in 15 degrees of water and can safely overwinter in 12 degrees of water. That said, it's not a big problem for them to survive in the waters of the Yangtze River Delta region in winter, let alone the Pearl River Delta region...
Further north? It's hard to say, it's really hard to say, who knows, if they can adapt? If that's the case, it's even more terrifying...
Maybe you will say: such a small fish, put it, what can you do?
First of all, this fish has a strong adaptability, and while it is resistant to low temperatures, its ability to tolerate low dissolved oxygen is much higher than that of native fish species.
In addition, mini parrots are very aggressive, and their ability to prey is not weak, so they will eat the eggs of other large fish, such as crucian carp, carp, and freshwater four (grass carp bighead carp).
And our native fish species, there are very few aggressive, and mini parrots have a strong "egg protection" instinct, so it is impossible to expect grass carp to take crucian carp to eliminate mini parrots.
Eating all the eggs is not the end, they will also eat small fish and shrimp and aquatic insects that are smaller than themselves, in short, they can bite and eat all.
In a few years, in the wild waters of mini parrots, the number of native fish and shrimp will be greatly reduced, and in the long run, some species will be completely eaten by them...
So, if you haven't bought a mini parrot yet, I advise you to think again.
If your fish tank is already like the picture below, advise you not to release it at will.
Also: The text is my original, and the pictures are borrowed from the Internet.
Thanks for reading. Wish: Will Kang happy, smile often open!