Human uses of living things used; and as symbols or concepts through totemism and animism. More recently, anthropologists have also seen living things as participants in human social interactions. This article describes the roles played by living things in human culture, so defined. The human population exploits and depends on a large number of animal and plant species for food, mainly through agriculture, an essential component of human culture, but also by exploiting wild populations, notably of marine fish. Livestock animals are raised for meat across the world; they include (2011) around 1.4 billion cattle, 1.2 billion sheep and 1 billion domestic pigs. Plants provide
USS Blenny (SS-324) engaged in evaluating new equipment. "Blenny" was reclassified an Auxiliary Submarine, AGSS-324, c. 1969. She was decommissioned, 7 November 1969 and laid up in the Reserve Fleet. "Blenny" was struck from the Naval Register, 15 August 1973. She was sunk to form part of an artificial reef about fifteen miles (24 km) off the coast of Ocean City, Maryland in June, 1989. "Blenny" received four battle stars for her World War II service and one battle star for Korean War service. USS Blenny (SS-324) USS "Blenny" (SS/AGSS-324), a submarine, was a ship of the United States Navy named for the