Because bighead carp fry is red color. I bought the chub fish fry is red color because the chub fish fry is red color, chub scientific name for bighead carp, also known as fat head fish, headfish, big head fish, black chub, hemp chub, male fish, etc., belongs to the phylum Chordata, Scleractinia, Carpiformes, Carp, bighead carp genus of a kind of freshwater fish. The bighead carp is similar to the silver carp in appearance, with a sideways flat body, and is one of the four big fish in China.