Piranha is mis-spelled Pirahna in the title and throughout the story. [Information from Aaron Kashtan via the error list, December 2008]
Letters of comment from Edward Ramos, Jr.; Robert G.; Marvin S. Sandler; and Robert Orloff. The single illustration is a panel detail reprinted from a previous issue. Also included is Marvel Value Stamp #52 Quicksilver (Series A). The figure art of Quicksilver is taken from the cover of Avengers #75.