Gulf of Mexico - Dolphins trained to kill by the U.S. Navy and armed with "toxic dart" guns may be on the loose in the Gulf of Mexico after Hurricane Katrina damaged their coastal compound. The Navy has refused to confirm that any dolphins they trained may be missing but have been actively trying to retrieve missing dolphins since the storm. The Navy has helped to recover a number of dolphins that escaped from the Marine Life Oceanarium in Gulfport, Mississippi, all of which they housed and examined before returning to the oceanarium.