Definitely doesn't look right to me.
The stones have very little overgrowth on them which if it were the supposed Atlantis it would be a lot harder to visualize what any of the objects were.
The metal vents as
@Roadtrip635 pointed out make it look man-made and maybe even an enlarged photo from an aquarium.
Also, everything appears to be in very shallow water, which if true, would have been found and noticed a very long time ago.
The architecture style doesn't appear to be related in the photos as well.
We really need a link or this thread will need to be removed!