Are coi and goldfish the same?

No, coi and goldfish are not the same. While they are both members of the carp family, they are different species. Coi are a selectively bred variety of common carp, while goldfish are a domesticated form of the wild Prussian carp. Coi are larger than goldfish, and they have a longer lifespan. They are also more expensive to purchase and maintain. Goldfish are more popular as pets because they are smaller, cheaper, and easier to care for.