http://www.newsweek.com/tens-thousands-fish-leap-sea-terrifying-fishermen-1037380

Tens of thousands of fish leaped out of the the waters around a fishing boat in a Taiwan fishing port, creating the appearance of a “boiling” sea, a video posted to Facebook has shown.

Fisherman Lu Jingwai captured incredible footage of sardines darting through the air and falling back into the water. Larger fish may have been chasing the sardines, driving them into a panicked frenzy, Sanlih E-Television News reported.