"The U.S. Fish and Wildlife Service is concerned about 38 federally listed species protected under the Endangered Species Act that could potentially be impacted by the oil spill in the Gulf of Mexico. Of those, 29 are endangered. In addition to those listed by state below, the National Marine Fisheries Service also lists as endangered the sperm whale, a resident of Gulf Coast waters."
U.S. Fish and Wildlife Service: http://www.fws.gov/