August's full moon goes by a lot of names, including the Sturgeon Moon, the Green Corn Moon, the Raksha Bandhan Moon, Nikini Soya, and the end of the Esala Perahera festival.
It is called the Sturgeon moon because during this time of the year, there is supposed to be lots of sturgeons out swimming around. Here is a link to some more information:
https://solarsystem.nasa.gov/news/1390/august-2020-the-next-full-moon-is-the-sturgeon-moon/