Where do you think that new kind of fish would come from if not from finding and adapting exicting genetic materials? We don't even have proper understanding o

Where do you think that new kind of fish would come from if not from finding and adapting exicting genetic materials? We don't even have proper understanding of how our body works and we have been looking at it for a long time. We are naive to think we can invent ourselves out of a vacuum. In all likelihood the current progress of humanity is leading us to a local minimum.