His name is Ferdinand. 

The Koi Angel Fish is a species of Angel Fish that has typical Koi markings, with black and white mottling and a gold head or a gold flash on its head. They are a natural species and are found in several rivers of Northern South America. Although most Koi Angel Fish found in pet and aquarium stores have been captive-bred for several generations, they do still appreciate an aquarium setup that is similar to the environment they would enjoy in the wild.

Temperature:75°F–82°F

Lifespan:6–10 years

Size:4”–6”

diet:Omnivore