sentences:  The fish food that is being recalled is for pet/ornamental fish and not used to feed fish intended for human consumption.The FDA launches and investigation after acetaminophen, best known under the brand-name Tylenol, is identified by ExperTox Inc., a laboratory in Texas, as a fifth contaminant present in many varieties of pet food.A single 500 mg tablet of acetaminophen is sufficient to kill an adult cat.