Is it safe to breed a guppy with a deformed lateral line?
I believe (based on my own experience when I was a novice breeder trying to create some new guppy strain from pet store guppys) that what you are experiencing is a deformity of the spine due to breeding poor quality fish that have been inbred too many times without proper outcrossing. For starters, let me define lateral line for you. Lateral line: lies usually along the middle of each side of a fish; senses changes in water pressure so the fish can control its swimming. The lateral line that you are referring to is an concentration of nerves, not an organ or anything detectable visually. Unless, that is you have an electron microscope and disected the fish you couldn’t really have seen the “lateral line”. Perhaps you were refering to a disability to swim properly and I misunderstood your question (if that is the case, I apologize) As far as the spinal disfiguration is concerned, I have found it to be a recessive gene that carrys the trait. I would not allow any of your gups from the f1