Most people feed these fish a commercially produced fish food pellet or flake. People have also introduced populations to natural waterways and these fish have established populations in the wild across the globe. These domestic fish live in human households virtually anywhere that humans live. Humans have also introduced the Prussian carp into other parts of Asia, Europe, and North America. However, their original ancestors live in freshwater habitats in portions of northern Asia. This species doesn’t have a wild distribution, as humans have domesticated them. The more fish you have, and the larger fish you have, the larger tank you need. The size of these tanks varies based on the number and size of the fish. However, most people keep these fish in aquarium tanks. They also prefer habitats with aquatic vegetation to eat. This is why these fish adjust easily to living in manmade ponds. They thrived even in areas with low oxygen and muddy water. The wild ancestors of these fish lived in slow-moving waters. They can see blue, green, red, and ultraviolet. Colorblind? – Though they seem primitive, the color of these beautiful fish isn’t lost on them! That’s because these little creatures are not colorblind.Researchers recognize the two fish as genetically distinct. People bred the koi from an entirely different species of carp, the Amur carp. Not a Koi – While many people believe that koi fish are simply larger versions of Goldfish, this isn’t the case.The Prussian carp has a scientific name of Carassius gibelio. Separate Species – In fact, these fish diverged from their Prussian carp ancestors so long ago the researchers recognize them as a separate species, Carassius auratus.Throughout the course of time, this selection lead to the development of the modern-day Goldfish Ancestry – Over a thousand years ago, people in ancient China began selectively breeding the Prussian carp for gold coloration. ![]() Learn more about what makes this species so unique, below. You can win one at your local fair, but these creatures are actually quite astounding in a number of ways. The largest recorded individual grew to a length of 19 in. Some measure just an inch or two long, others surpass a foot in length. Size also varies greatly depending on the fish. Their coloration varies, but includes white, orange, black, red, yellow, brown, and any combination of the above. People have bred a wide number of different colors, shapes, and sizes in these fish.
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