This 15-second 4K underwater clip captures a school of black rockfish swimming in coordinated motion across the reef at 5 Fathom Rock, a well-known dive site in Port Hardy, British Columbia. Filmed using a 16–35mm wide-angle lens, the shot provides a sweeping view of the group behavior typical of this Pacific species, with the fish maintaining a loose formation as they patrol the rocky terrain. The visibility is clear and the composition stable, making it a versatile clip for science communication, editorial storytelling, or broader cold-water reef scenes. Both graded and ungraded versions are included with your purchase.