Ever Heard of a Bait Ball?

I had an incredible new scuba dive experience this week.This was in relatively shallow water and I was looking down adjusting my gear and camera. When I looked up I saw a massive dark wall coming RIGHT towards me and I would be lying if I said I didn't have some "interesting feelings" for about 15 seconds while I fumbled around with switching from snorkel to reg, getting camera on and descending into the cloud to capture this moment! #superschool

https://en.wikipedia.org/wiki/Bait_ball