What If these 'aliens' have just been living on Earth and in the water for a Long time. Crashed UFOs on the surface to us are like drunk driver crashes in the woods to deer.
The main civilization underwater just doesn't care enough about the surface to do anything for the most part. What do you think of this possibility?
I don't think so, they are millions of years ahead of us. They wouldn't just crash like a drunk driver.
I think this is part of why the mystery is hard to nail down.
That there are physical beings/crafts from inner earth that fly around. (Probably typically known as demons)(probably the grays)
There are beings/crafts from alternate dimensions that fly around. ( also probably typically known as angels and demons) (these other dimensions could be what has been known as heaven and hell)
I also want to believe that there are actual extraterrestrials from other planets/solar systems, but they probably constitute 0.1% of the UAP phenomenon. (They are probably human like and typically called Nordics.)
I believe it could be possible that some of these ships/beings are time travelers from the future (and maybe the past).
Also! I believe that now there are probably reversed engineered crafts flying around.
So, inner earth beings, time travelers, extradimensional, extraterrestrial, US black projects. Did i miss anything?