Doubler
Contributor
Back in the 80's when I had my own boat in Oahu we use to do this crazy crap too. I'd drop the anchor down to 50 FT and you would sit on it while we drifted. We called it "Live Bait Diving" One pass of an Oceanic cured us of that. The tank banging is probably what attracted them. Not real smart to bang at night in deep water. Oceanics look at that as a dinner bell. THey are attracted for miles by underwater sound. They are usually the first at a sea disaster because of the noise. And they always come from behind. And Close. And over and over. That one photo with the pecks down looked like posturing to me.