Source -- J.D. Knight. Sea and Sky http://www.seasky.org/mainmenu.html Last visited: 04/02/03
Source -- Elizabeth Keller. Gallery of Deep Ocean Creatures http://www.extremescience.com/deepcreat5.htm Last visited: 04/02/03
Source -- Fetzer, Scott. "The World Book Encyclopedia" World Book, Inc.,1986, pp.61