James Cameron has a serious issue with the physics of the water in “Aquaman”: The water is just not watery enough.

The “Avatar” and “Titanic” director shared his thoughts on the blockbuster movie in an interview with Yahoo!

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He said “Aquaman” was “great fun,” but “I could have never made that film because it requires this total dreamlike disconnect from any sense of physics or reality. It exists somewhere between a Greek mythic landscape and a fairy tale landscape. And people just kind of zoom around underwater because… they propel themselves mentally? I guess?

“I’ve spent thousands of hours underwater. I’m very literal about my underwater. It needs to look like it’s real,” Cameron argued. “And while I can enjoy [‘Aquaman’] I don’t resonate with it because it doesn’t look real.”

Cameron, 64, also said the superhero action movie did not do enough to call attention to the severe environmental impact humans have on oceans.

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“It doesn’t help us with our issues of actually understanding the ocean and exploring the ocean and preserving the ocean — though they did throw in a couple things like whales and things like that to remind us we are using the ocean as a garbage dump, so I applaud the film for that,” Cameron expressed. “Yeah, I couldn’t have made that movie.”

“Aquaman” has grossed more than $1.1 billion worldwide, surpassing “The Dark Knight Rises” as the highest-grossing film based on a DC Comics character. It was also the fifth-highest-grossing film of 2018.