I spent many months at sea back in the 80's, early 90's during my time on Coast Guard patrols along the Pacific coast, from Canada, down to Central America.
The only strange thing I seen was easily explained but scared the hell out of me initially.
When standing look out at around 2 am on my very first deployment, I saw what I thought was a torpedo heading for my cutter, I panicked and reported it to the OOD.
Turns out that it was a Porpoise that was bathed in bio luminescence
Man I caught hell for a long time over that, shipmates can be so cruel
Other than that, no.
edit on 11/23/2012 by Juggernog because: (no reason given)