Aquaman (Arthur Curry, played by Jason Momoa) is the son of Tom (Temuera Morrison), a New England lighthouse keeper, and Atlanna (Nicole Kidman), the Queen of Atlantis.
Atlanna was arranged to be married to a man she didn’t want to be with and fled the seas. Tom found her, they fell in love, and had Arthur, proof that the people of the ocean and the surface could co-exist… in more ways than one. Arthur’s existence threatened the kingdoms of the sea, and infuriated the powers that be, so Atlanna was forced to return to Atlantis leaving her new family behind.
All his life, Arthur was led to believe his mother was killed because of this, but she survived and reemerged once Arthur finally claimed the throne of Atlantis. But we’re getting ahead of ourselves.