Yeah, snappers are scary, but they will pretty much run away from anything larger than they are, and only snap at you if you mess with them.
And you don't get masses of them together like that...
So what is in the second one, ferrets? Not sure those run in groups either, but only know them from people that have had them as pets. But I guess the color isn't quite right for a ferret, maybe some kind of weasel?