Sea Otters solve major ecological problem.

[Catherine]

California's Elkhorn Slough is having a problem with invasive green crabs.  They arrived in the 1980s and humans have spent millions trying to get rid of them.
They kept coming back in greater numbers each year. Then the crabs started disappearing.
When the scientists started looking they found sea otters munching on the crabs. There are about 100 otters who call Elkhorn Slough their home now, because they really like the invasive crustations.

https://www.thecooldown.com/outdoors/sea...-predator/

Maybe there is an answer here. We can sort out ecological disasters by ecological means.
We have seem what wolves can do in Yellowstone National Park. Beaver are transforming areas and rewilding them. 
A pack of wild sea otters are controlling and eliminating an invasive species.

I wonder what else nature can do for us.