Numerous underwater waterfalls are seen in this movie. This is an actual phenomenon. The ocean is made up of two different layers of water: warm, light water, and cold, dense water. The difference in densities means the layers are separate and causes the heavier cold water to fall, forming a waterfall.

During the duel between Arthur (Jason Momoa) and Orm (Patrick Wilson), an octopus plays a drum solo. According to writer and director James Wan, this octopus is Topo, Aquama's octopus sidekick from the 1950s and 1960s, who was able to play musical instruments.

Supporting characters

Andrina Curry: The daughter of Aquaman and Mera. ...
Aquababy: Son of Aquaman and Mera, Arthur Curry, Jr. he inherited Meras water-controlling powers while having the unique ability to create and mutate sea life. ...
Aquagirl: See Aquagirl.

Aqualad: The son of Black Manta who chose to become a hero.

Arthur Joseph Curry: Orins successor as Aquaman.

Atlanna: a member of the Atlantean Royal Family and the mother of Aquaman, formerly the Queen of Atlantis. She conceived her child with the human lighthouse keeper Tom Curry.

Cal Durham: An African American hero who befriended Aquaman. He once served as Black Mantas lieutenant and was given the ability to breathe underwater.

Cerdian: The infant son of Dolphin and Tempest (Garth).

Cetea: The Reverend Mother of the Widowhood of Atlantis.

Dane Dorrance: Leader of the Sea Devils, a team of underwater adventurers.

Deep Blue: Aquamans half-sister, also known as Indigo. Debbie Perkins was thought to be the daughter of Neptune Perkins and Tsunami, but Atlan (Orins father) was revealed to be her true father, meaning that she is Orins half-sister. She cannot live out of the water. She can control sea life if she touches it and can even change the size of sea creatures once she touches them.

Stephen Shin: A marine biologist and good friend of Tom Curry, who mentored young Aquaman after his father discovered his unique abilities. He soon became obsessed with finding the lost city of Atlantis and attempted to kill Aquaman for not revealing the location.

Dolphin: An amnesiac with alien-enhanced Atlantean-like physiology who was briefly Aquamans love interest.

Elsa Magnusson: The widow of Mark Merlin and an accomplished sorceress.

Erika Watson: An officer of the Amnesty Bay Police Department, who used to go to school with Arthur Curry before he became Aquaman.

Garth: An outcast orphan from the Atlantean colony of the Idyllists whom Aquaman took in and who became for a time Aquamans crimefighting partner and a member of the Teen Titans as Aqualad. He currently goes by the name Tempest.

Hila: Meras twin sister; even Aquaman cannot tell them apart. Hila is married to Kandor, a former criminal. She is less responsible than Mera and a little more wild. Current whereabouts unknown.

Iqula: The King of Tritonis, sister city to Poseidonis, which is populated by merpeople.

Jim Lockhart: Golden Age hero formerly known as the Red Torpedo.

Jurok Byss: The Keeper of the Monsters, a position in Atlantis military structure.