I could not have asked for any more drama in a photograph than this. A pod of Dolphin were herding schools of fish at the mouth of a river. This is a favorite hunting spot. This is one of a few groups in the world that have learned to herd, and push, fish to shore. If the bank is steep enough, they go right up with them.
Here a large adult forced the school to shore, and has caught one, a second is jumping to escape. Adults grow to about 13 feet (4 m) and weight between 600 – 1100 pounds. They swim at 17 mph (27 K).
Best to use common sense around them.