I was diving with another experienced diver. It was a treat as he was graciously pointing out things underwater. He suddenly pointed toward the surface and I thought the third member of our group had made and emergency surface maneuver. No, there was what appeared to be a group of bubbles approaching. And as they came closer this was a shocker. It was a school of fish on a mission. They were headed somewhere and with a purpose. There were no predators in sight. The school had its mouth open. They looked prehistoric and dangerous except that they paid the divers (including me) no mind. I just started clicking away as fast as the camera would recycle. With those jaws open they were quite a sight.I am looking through my collected images and it appears that this is the same fish when it is not so ferocious looking. Same tail and it looks so docile….not.