This fruit of the nopal cactus is known as tuna in Mexico - not to be confused with the fish, which is called atún - in English it's called prickly pear.
Prickly Pear (Tuna)
From Suzanne Barbezat, About.com
© 2006 Suzanne Barbezat, licensed to About
©2009 About.com, a part of The New York Times Company.
All rights reserved.