Any time you bread Onyx (Bills fish)you are going to get deformities.The LINE of fish has been around for 25 generations now.There are an extreamly large amount of perfect fish.I do not kill my fish.I separate the perfect from the (not so perfect).I feel like if I raised them, I should not kill them.This is a practice that is VERY popular with people who dont want to spend alot for Onyx.By the way, a few Inland Aquatics spawners can from the same fish as Rods and Booyahs.Most of there spawners are Rods babies.So you will see the same amount of deformities.I would suggest you look for broodstock on a (Fish by Fish) basis,instead of breeder by breeder. One way to lesson the affect of line breading is to find a UP line female (1997) and a downline male (2008)..While keeping in the same line.I hope this helps.Mitch