Try telling BastardFish this.The greatest risk in crossing species from different locations is any potential unique evolutionary history, and possibly unique behavioural traits, are in an instant lost forever. Genetically speaking these fish could be different/unique from each other. In fact, in many cases over the years new species have been described, from what was once a large group of fish all lumped together under the same genus, or species. It's a slippery slope.....