Koi is a well-known pet fish, commonly raised in ponds in various parts of the world. However, some koi fish can tolerate living in large aquariums for as long as their space requirements are met.
But did you know that however colorful they can get which, at most times, become pleasing to the viewer's eye, they are actually classified as invasive species? An example of koi becoming invasive occured in Colorado lake. Natives have reported that koi fish were dumped into a lake and caused other species of fish to be wiped out.
According to a few reports, when they are placed in a place foreign to them, they can cause harm to the local environment. In fact, in Maine, USA, this species of fish are considered illegal to own.
A person in Harpswell, Maine was arrested after the officials caught them owning a total of 50 koi fish. Reports suggest that these fish were confiscated by the officials.
In the Philippines, there are no reports of the fish being invasive. In fact, these koi fish are kept in aquariums in various pet shops all over the country where they sell fish.
The picture above is the author's koi fish.
The author currently owns three koi fish co-existing with two angelfish in a 50-gallon tank. It is made sure that there won't be any mortality in between fishes -- to do this, the author makes sure that the temperature should range between 24-26 degrees Celsius which is the average ideal temperature for both freshwater fishes.
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