How to use "underwater" in a sentence

It was like a big, underwater explosion!"

I found myself underwater

What all of us thought was a large whale was a three-hundred foot long underwater ship

The Nautilus travelled underwater watching the mysteries of the ocean.

"Our escape? We are underwater! How can we escape?" "Not now

We were looking through the underwater windows at the beautiful fish

The Nautilus moved up over the mountain, and I saw that the light came from an old underwater volcano

We travelled underwater, never coming up except for air