Aquagirl is the alias used by several superheroes appearing in American comic books published by DC Comics, typically depicted as supporting characters of Aquaman originating from the realm of Atlantis. The first two incarnations of the character, Lisa Morel (1959) and Selena (1963), were introduced as one-offs.

Aquaman is a superhero appearing in American comic books published by DC Comics. Created by Paul Norris and Mort Weisinger, the character debuted in More Fun Comics #73. Initially a backup feature in DC's anthology titles, Aquaman later starred in several volumes of a solo comic book series. During the late 1950s and 1960s superhero-revival period known as the Silver Age, he was a founding member of the Justice League. In the 1990s Modern Age, writers interpreted Aquaman's character more seriously, with storylines depicting the weight of his role as king of Atlantis.