October 10, 2005. Colorful tropical fish caught by Randy Fernley, owner of Coral Fish Hawaii in Aiea, swim in a bucket in Honolulu, Wednesday, Sept. 21, 2005. The tropical fish Fernley has been netting and selling to mainland wholesalers and amateur enthusiasts for more than 25 years are as delicate as they appear, and his livelihood requires that he protect them. Hawaii is the United States' largest exporter of ornamental fish, but the industry of aquarium fish collecting is largely unregulated , less than 1 percent of Hawaii's coastline has rules of any kind governing the harvest of tropical fish.