Unite 2016 Fish Flocking demo

Hi
Anyone know where I can find the source code for this Unity 2019 fish flocking demo?
I am interested in BOTH the older non-ECS version as well as the newer optimized ECS version

Any feedback appreciated!

I suggest you search Dots forum for shool fish and voids keywords.
See also firs sample link

In git, look for voids in advanced assets category.