Tom Curry (Arthur's dad) is played by Temuera Morrison, a New Zealand actor who is himself half-Maori and half-white.
They really went the extra mile in terms of casting someone who could relatively match Jason Momoa's own combo ethnic background.
I also like that AQUAMAN seems to be eschewing the now-overdone trope of superheroes not being raised by both of their biological parents, and that this Arthur was raised (at least to a point) by his bio-dad and bio-mom.