Whales: An quick example of supporting the things we depend on

One of my major goals is to live in such a way that:

1. I am aware of the things I depend on, and
2. I live in a way that supports those dependencies, living or not

I found a example of non-humans doing this. Below is a short video explaining how whales sustain the lives of the animals they eat - so much so, that as whales became heavily hunted, the populations of fish they ate actually decreased, even with fewer predators to eat them!