Speciation has been observed, both in the wild and in the laboratory.
Excellent input. Thank you. I will review and consider this.
It may be that my arguments need to be re-evaluated. Or it may be that my definitions are at fault again. For example, the hypothetical changes in a fish may technically lead to a new species of a fish. (Although I'm not admitting that until I review this information you've provided.) But for the theory of evolution to be true, a fish would have to evolve into something that is not a fish and is more complex than a fish. All by itself without intelligent intervention.
Such a change would have to be observable, reproducible, and predictive. Until it is, you are not talking about the scientific method.
Again, thanks for the input.