Mr. Blake of Yorktown said that while hobbyists could breed fish for their own collections, anyone who tried to sell the GloFish they bred would be infringing the company's patents. He would not say what action would be taken if unauthorized fish were sold by individuals, but he said the company would try to enforce its patents if a business was doing the selling. The GloFish wants to be free! Children in the crosshairs: enforcing patents on GM pets | 
