Weren't all the sightings in the sky, not underwater?
6 seconds sound clip from the The Atomic Submarine movie soundboard.
You can hear this line at 00:31:30 in the DVD version of the movie.
Quote context
[...]
- I knew there was something familiar. Take a look.
- Unidentified Flying Objects.
- Then this is a flying saucer.
- That was the popular designation, yes.
- Weren't all the sightings in the sky, not underwater?
- This would explain why there were never any reports of landings.
- That would make our little green men actually little green fish.
[...]