Crustaceans (Crustacea) form a very large group of arthropods, usually treated as a subphylum, which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill and barnacles. The 67,000 described species range in size from Stygotantulus stocki at 0.1 mm (0.004 in), to the Japanese spider crab with a leg span of up to 12.5 ft (3.8 m) and a mass of 44 lb (20 kg). Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by the nauplius form of the larvae.
Most crustaceans are free-living aquatic animals, but some are terrestrial (e.g. woodlice), some are parasitic (e.g. Rhizocephala, fish lice, tongue worms) and some are sessile (e.g. barnacles). The group has an extensive fossil record, reaching back to the Cambrian, and includes living fossils such as Triops cancriformis, which has existed apparently unchanged since the Triassic period. More than 10 million tons of crustaceans are produced by fishery or farming for human consumption, the majority of it being shrimps and prawns. Krill and copepods are not as widely fished, but may be the animals with the greatest biomass on the planet, and form a vital part of the food chain. The scientific study of crustaceans is known as carcinology (alternatively, malacostracology, crustaceology or crustalogy), and a scientist who works in carcinology is a carcinologist.
William Darrell "Billy" Mays, Jr. (July 20, 1958 – June 28, 2009) was an American television direct-response advertisement salesperson most notable for promoting OxiClean, Orange Glo, and other cleaning, home-based, and maintenance products on the Home Shopping Network, and through his company, Mays Promotions, Inc. He and his business partner, Anthony Sullivan, were also featured on PitchMen, a TV series that documented their work. His distinctive beard and impassioned sales pitches made him a recognized television presence in the United States and Canada. Mays was found unresponsive by his wife in his Tampa, Florida, home on the morning of June 28, 2009. He was pronounced dead at 7:45 am, appearing to have died sometime overnight.
Mays was born in McKees Rocks, Pennsylvania, attended Sto-Rox High School, and was raised in Pittsburgh, Pennsylvania. He later attended West Virginia University, where he was a walk-on linebacker on its football team during his two years there. After dropping out, he worked for his father's hazardous waste company before moving to Atlantic City, New Jersey in 1983.