Arthur’s abilities
Because his mother is of Atlantis, and he’s the rightful king, Arthur has the ability to communicate with all creatures of the sea. It’s what makes him most unique from everyone else down there. Because they, like him, are also all super strong and can swim with super speed.
We also see, in Aquaman as well as Justice League, that Arthur also has a superhuman ability to party. Whether or not that comes into play in the new film remains to be seen.
