I understand killing off the deformed fish but if a fish is no different than a mammal, would you drown a deformed dog?It's interesting to me because today for example, I just flat out flushed 3 living fish from a growout tank. I do this regularly. Why? The fish were stunted. They were never going to grow to a saleable size, I don't have a million tanks I can put deformed and tiny fish into and I don't have the time to wait for a member of peta to find my ad and decide to adopt these guys. A fish is really not much different than a mammal but can you imagine the bad name I would make for myself if I was routinely selling deformed or stunted fish? When I have the space in the freezer, I try to freeze culls to death since it is supposedly more humane but that isnt always an option. I can't continue to feed fish that I am not going to sell so it's either flush them or starve them to death, I feel flushing is better.
If someone is raising so many animals that their best care is impossible to handle, then they are raising too many animals or need more hired help. There is no reason a single animal should suffer, in the name of profit.
