|Hey, aren't you that plant lady, Poison Oaky?|
Arthur Jr. was the heir apparent to the throne of Atlantis. Arthur Jr. became the focal point in Arthur's life, causing him to make sacrifices to protect his kingdom; going to the surface world and arguing his nation's safety at the World Assembly and severing his own hand to save himself and Arthur Jr. when Orm's treachery was revealed.
The character is never named on screen. Only pronouns are used to refer to him. The title of this article is conjecture based on the name of Aquaman's son in DC comics.