WATCH: Sharks' shoreline feeding frenzy on school of fish

Fisherman Donnie Griggs captured the scene at North Carolina's Cape Lookout National Seashore. Below is a similar frenzy in the Bahamas.

In both cases sharks had trapped a school of fish near the shore, then systematically started eating them. This is quite common among both fish and aquatic mammals.

Birds often join in, as in this sardine hunt involving dolphins, sharks, and birds.