For some people, goldfish and koi fish look like similar fish, but in the fact both are different species. There are so many difference between koi and goldfish that we can see if we look at both of them carefully. The easiest is to see the colors and patterns attached to the body. Koi fish produce colors that are more metallic and sharper than goldfish.
Differences of shape that we can see that is, koi fish have a larger body than goldfish in adulthood. The koi body is longer and more cylindrical in proportions and shapes than carp, which has a more lateral body compressed with larger fins. The goldfish have a split tail fin, whereas in koi, the tail fin joins. The dorsal fin of carp is released and free from behind, while in koi, is attached along its length. In addition, goldfish have more variety of shapes.
From the data I found, the difference in life span between the koi and the goldfish showed a very large difference. Goldfish allegedly survive about 25 years while koi fish can live about 60 years with a length can reach 100cm. Despite the striking differences in life, both characters are very different. If you want a water park with fish and plants, remember that koi can knock the plants around, pull it out and even eat it. Goldfish will not disturb the plants, and will enjoy racing around them.
For the difference between koi and goldfish babies maybe we can only see it from the pattern and color of his body. Because to see the whiskers or fins still look the same between the two, unless you often pay attention to the rural between the two. If you are planning to keep koi and goldfish in the same tank, it will not be a problem, as both are not predatory types that prey on one another. They can even interbreed each other, but the resulting offspring are always sterile.
Because the higher price and size of koi fish is bigger than goldfish. so if you are a beginner and intend to maintain it, I suggest to choose goldfish first, besides the affordable price factor you also do not need the recommended amount of space for koi fish. Exceptions apply if you are a rich one, you are free to do whatever you want. LOL ..
Indeed the ancestors of goldfish are gray or silver. However, through selective breeding, Chinese fish keepers are able to produce various colors of carp and body shape. Red and gold varieties are selectively bred. Goldfish colors can also be metal, flat, or colorful. The color of goldfish can change with age, or the color of goldfish can return to the metallic orange when stored in warm water. They will also change their coloring based on the used lighting spectrum. Goldfish produce pigments in response to light, and their cells will cause different colors or reflections based on light.
To assure you of the difference between koi and goldfish please look at the carp and koi fish. The main points are: size, color and pattern, mustache or barbells, body shape. So little explanation from me about the difference of carp and koi fish, hopefully this could be understood.
Also check my another post about Learning Basic Koi Keeping.