Which 斗鱼 breeds come in 纯色?

Club breed standards describe 纯色 for the 斗鱼.

斗鱼 pattern

纯色

One color all over with no pattern or white: self in rabbits, cavies, rats and canaries; a tongue or hoof of one even color.

9 斗鱼 breeds list 纯色. It is in a club standard for 1 breeds.

Breed	IBC
斗鱼	符合标准 (“Solid”)

How 纯色 can appear or change over an animal's life.