Graeme and Kathy's Gallery of Rays
Bridges, William, Water World, American Heritage Press, New York, 1970, p.91.
Cerullo, Mary M., Lobsters: Gangsters of the Sea, Cobblehill Books, New York, 1994.
CD-ROM "Crabs," "Lobsters," "Sea Snails," "Starfish," "Whales," Compton's Encyclopedia, New Media, Incorporated, New York, 1996.
CD-ROM "Coral," "Dolphins," "Jellyfish," "Sea horse," "Shark," Microsoft Encarta, Microsoft Corporation, 1993, Funk and Wagnalls Corporation, 1993.
Cousteau, Jaques,The Whale, Arwood Press, New York, 1972.
Harrison, Fredrick W., "Sponge," World Book Encyclopedia, World Book, Incorporated, Volume 18, 1994, pp.799-801.
Martin, James, Tentacles, Crown Publishers, Incorporated, New York, 1993, pp. 14-21.
Martin, Ken, Giants of the Sea, Gallery Books, New York, 1988, pp.34-45,63.
Smith, Lisa, (Online Interview), July 26, 1997.
Stidworthy, John, Simple Animals, Facts on File Publishers, New York, 1990.
"Whales," Groiler's Encyclopedia, Groiler, New York, 1993.