In superhero blockbuster Aquaman, popular Hollywood actor Jason Momoa plays the role of protector of the deep, but with the world's oceans under threat in real life, he is also taking the fight off-screen.
"Without a healthy ocean life, our planet as we know would not exist," Momoa said with the sea behind him as he took part in an event on a Portuguese beach ahead of the United Nations Ocean Conference in Lisbon, which starts on Monday.
