After the flood of crabs and snails, there was a flood of "seafood" that left Canadians devastated. What's even more helpless is that this time even Chinese foodies can't do anything!
Recently, a large number of "Big Mac" goldfish have suddenly appeared in many parts of Canada, not only large, but also the number has grown at an alarming rate, which is simply the rhythm of flooding!
Image source: Euronews
If you have the impression that goldfish are the kind of small ones in the tank, then the next picture may subvert your cognition!
Let's feel it ↓ ↓ ↓
Image source: BBC
Image source: Euronews
Suddenly a large number of giant goldfish appeared, and anyone who saw it had to be frightened! Moreover, these goldfish are ten times the size of ordinary goldfish, and some are even larger than football...
Be aware that this goldfish is native to East Asia and can continue to grow throughout its life, and if the conditions are right, they will grow even larger!
It turns out that water tanks of limited size are a constraint on them, and too little living space can cause them to be stressed, which hinders growth. Under the right conditions, goldfish can actually grow as big as the small animals in pet stores.
By releasing hormones, they are even able to regulate the size of themselves and the surrounding fish according to the availability of natural resources. Since Canadian waterways have a very rich food source, they are growing at an alarming rate.
In October 2021, Nick Mandrak, a biology professor at the University of Toronto Scarborough Distribution, found more than 20,000 goldfish in a pool outside Of Ontario.
"These ponds are extreme environments, not only shallow, but also extremely low oxygen, and the temperature can reach more than 20 degrees in the summer." But they also have super survivability in such harsh environments, Mandrak said.
Image source: Reddit
As climate change causes water oxygen levels to drop, scientists worry that the fish will have a competitive advantage over native species.
Unlike many fish, goldfish can be found in the water of poisonous blue-green algae and even help them grow. Their eating habits also increase sediment, making water turbid and lowering sunlight levels, limiting the growth of other species.
In addition to Ontario, Canada's A, BC, Saskatchewan, Manchester, and even the United States are fast becoming one of the most prolific invasive species in North America.
Unexpectedly, our little goldfish went so strong in the wild! It's a pity that goldfish can't be eaten, otherwise it can help to eliminate it