Interesting Facts:

• Blue Tangs are bright yellow when born but turn blue or purple when fully grown.
• The blue tangs in the Gulf of Mexico swim together in a school as they would in the wild.
• The white triangle on the blue tang's tail is more than just part of its "looks"; it's actually a dangerous spine used for protection.
• The blue tangs at the Aquarium have tripled in size since they were collected in the Florida Keys.
• Normally the spines lie flat in a groove, but if the fish is mad or scared, they come out and can cause serious wounds on an enemy as the tail is thrown back and forth.
• Feeds entirely on algae
• One of the main characters in the movie Finding Nemo, Dori, is a Blue Tang.

http://www.globaldialog.com/~jrice/fish_page/bluetang.htm

http://www.exotictropicals.com/encyclo/marine/tangs/powderblue.htm

http://www.reef.org/webres/gallery/carib/images/014.htm

http://marinedepotlive.com/marinedepotlive/753574.html

http://www.marinedepotlive.com/blue-tang.html