Koi Size/Grade:5-6" and even koi-like patterns with

and even koi-like patterns with vibrant orange and black markings

the male guards the eggs and fry until they become free-swimming

Males typically display a body color that ranges from soft blue or lavender to bright yellow

Black Filter Sponge

Koi Size/Grade:5-6" and even koi-like patterns withThe Koi, scientifically known as Cyprinus rubrofuscus, is a domesticated variety of the Amur carp selectively bred for ornamental purposes. Originally developed in Japan, Koi are now beloved worldwide for their vibrant colors, graceful movement, and symbolic associations with prosperity and perseverance. They are best suited for outdoor ponds but can be housed in very large aquariums with proper care. Adult Koi can reach impressive sizes, often