Only tryout issue. In Amazing World of DC Comics #10, January 1976, in the article, "There's No Cases Like Showcases", Jack C. Harris notes, "J. Scott Pike, longtime romance illustrator, wrote and drew the mysterious Dolphin story for a one-shot try-out in #79 (Dec. 1968). A short story, the issue was rounded out with a reprint of the aquatic origin tale of Aqualad."
Nick Caputo suspects Giordano either inked the cover or provided alterations, particularly on Dolphin's face.
Full credits on page 1, "Created, written, and illustrated by J. Scott Pike. Edited by Dick Giordano." Story sequence has 2 half pages and 1 two-thirds page, so sequence is 16.667 rather than 18 pages. Dolphin's origin was explored later in AQUAMAN.
Reprint of the origin of Aqualad. Writer credit of Robert Bernstein by Martin O'Hearn. Jack Miller writer credit removed by Mike Nielsen [6/2007]