Fish Boost

The Fish Boost - technically not a boost in of itself - is a technique where one chirps at Fish as they dive, allowing them to regain their scarf power without landing, and to climb to even higher heights.

Videos
Tutorial video: https://youtu.be/ZzlBeqHU7bE

A video that shows a lot of fish boosting. Jump to 3:27

https://youtu.be/TQqHase3jMY?t=207