"The film reveals the origin story of half-human, half-Atlantean Arthur Curry and takes him on the journey of his lifetime -- one that will not only force him to face who he really is, but to discover if he is worthy of who he was born to be... a king," a synopsis of the movie said.
Friday's photo shows Momoa's Curry as his alter-ego Aquaman, standing on a rock in front of a waterfall, holding a trident.
He is wearing a form-fitting, orange shirt with a fish-scale pattern and green pants, boots and gloves.
Momoa previously played the role in "Batman vs. Superman: Dawn of Justice" and "Justice League," but this is the first movie to focus on Aquaman.
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