Well, his brother Liam does look quite a bit like himHe's basically the Thor of the ocean's.
Verily.My favorite Aquaman is the bombastic, bearded one from Batman: The Brave and the Bold, and when I try to think who could play that version in live action, Chris Hemsworth is the first name that comes to mind. Although being Thor would create sort of a conflict there...
You raise an interesting question for discussion, though, namely: Why is Aquaman more like Thor than he is like Namor? Or is he?