A movie that encountered a huge group of dolphins so surprised

It is a movie that I encountered the hordes of dolphins surprisingly surprised while sailing on a boat. There are so many dolphin hordes, is there a rich abundance of fish as a sea?

Details are as below.
When you see the sea surface, you can see well that the huge group is coming from afar

Pico and dolphins jump

I am a bit scared as far as I can. The movie is here.
Dolphins Clip - Video

in Video, Posted by darkhorse_log