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Under Phase I , the USDA will evaluate current federally funded animal identification systems and determine which system ( s ) should be used . Examples will be drawn from various phyla including Gnathostomulida , Loricifera , Cycliophora , Micrognathozoa , and other poorly understood animals . We will pay particular attention to neuron-glia communication at the physiological level so that this information can be used to compare with the physiology of various genetically modified animals . A fluorescent zebrafish was the first genetically engineered animal to be marketed , and biotechnologists are developing many transgenic fish and shellfish . However , one biotechnology corporation , A / F Protein , seeks to make their GE salmon the first genetically engineered animal to make it to American dinner tables by next year . Other frequently sighted animals might include howler , Capuchin white-faced , and squirrel monkeys , caimans , crocodiles , sloths , iguanas , river turtles , otters , snakes , and thousands of butterflies including the giant iridescent blue morpho .