I believe FishFreak95 is talking about natually and artificially hybridization are different things. For example: Blood Parrot and some strains of Flowerhorn are artifically hybrids. Glofish are not "hybrid" but it has jellyfish genetics, it do not occur naturally in the wild zebra danios so I personally believe that Glofish are artifically hybrids. Naturally hybridization can happens in the wild, look at Polar/Grizzly bear case and you can find hybrid sunfishes more common in some lakes.