[little worm on a big hook]

hi error, you are talking about breeding right? not the scientific gene manipulation like those glow in the darks. you are breeding certain fish with other fish to establish color traits, size, or finnage. you are not mutilating, disecting, or pumping him full of chemicals. you are just putting him or her in a tank with the opposite sex to get the color, tail, or finnage that you the breeder think is most desirable.