This issue marks the re-launch of Aquaman in his own title, continuing the numbering of the 1962 series. Issue #56 was dated March-April 1971. Aquaman had been appearing in Adventure Comics (DC, 1938 series) #435-437 and 441-452 prior to this re-launch.
On-sale date from the publication date reported to the U.S. Copyright Office found in the Catalog of Copyright Entries, Third Series, Volume 31, Part 2, Number 1, Periodicals, January-June 1977. Class B periodical. Copyright registration number B231845.
Same on-sale date in Comic Reader #143.
Color credits provided by Anthony Tollin.
Storyline continues from Adventure Comics (DC, 1938 series) #452 (July-August 1977).