Why Godzilla doesn't Need Gills.

Then how did he survive sleeping on the bottom of the ocean for millions of years? I mean I know he might have big lungs but surely no size of lungs can hold air for millions of years. Also, the monsterverse is not the only Godzilla version that has gills. The Showa Godzilla also has gills and so does shin Godzilla.

I honestly don't see the problem with Godzilla having gills. He spent most of his time in the water anyway so why not.

Well, seeing as the MonsterVerse operates with the Hollow Earth theory in mind, it's likely there are dry land caverns where he made landfall.

But even the Showa Godzilla had gills, so...

I agree with the hollow earth theory and Godzilla possibly using them to breath and also reptiles also have the ability to slow their heart beat to hold their breath longer and as I said they can also absorb oxygen through their skin Godzilla being a super reptile most likely could do this as an alternative to gills also I'm aware that the showa and shin Godzilla had gills and I don't like them i personally prefer the heisei Godzilla and millennium Godzilla who did not have gills and one chart that showed one of the original godzillas could hold its breath and basically recycle breathe the air it was holding until it needed to breathe again also maybe Godzilla also every now and then surfaces to breathe then submerges again.