Colors credit provided by Anthony Tollin.
Inside front cover. An advertisement for Hostess Cup Cakes featuring DC characters and produced by DC staff.
Series continues in Aquaman (DC, 1962 series) #57 (August-September 1977 issue). That 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).
Promo for Superboy taking over the spot in Adventure Comics and Aquaman moving to his own title.