The scientific or taxonomic name would be Cyprinus carpio.
Koi is the animal. A koi is a fish.
Cyprinus Carpio
Koi fish Koi fish
There is no scientific name for just big fish.
Koi fish can live in almost any country. Koi are thought to be originally from Japan. Many people have outdoor fish ponds in which Koi are the dominant fish.
Koi (the fish name, meaning carp) sounds like the word for "fancy" or "love". In Japanese characters, Koi is "恋".
Most Koi carp are colourful
Erpetoichthys calabaricus is the scientific name for the reed fish
The scientific name for a clown fish is a amphiprioninae.
The scientific name for a puffer fish is Tetraodontidae.
a fish, a koi carp