03-02-2011, 07:07 PM
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In fish interbreeding can always cause issues, most of the time you will not notice it. A prime example is the lifespan of most domesticated guppys. Part of the reason they have such a short life span is duie to the interbreeding to get the large tails and the vibrant colors. On the other hand it is a good way to keep a strain pure. I have a large colony of over 300 endlers that I have just left alone to reproduce amon themselves. From time to time I scoop a couple hundred out and take them to the pet store and they can sell them as pure endlers.