It's clear you're not going to listen by now, and you'll keep adding family friendly tags to everything and anything even after being told is not. No point in explaining.
There is nothing wrong with this picture so why not. I am mainly going back to older pictures and seeing if any pictures that are family_friendly are being overlooked and adding them to that pool.
I think this goes in the parody category because its clearly meant to resemble king slime. I don't see this as a family_friendly picture either because of the presence of danger (though not to yukkuris), but that's just my opinion.
Also.... non_violent = nobody dying, including but not limited to yukkuris. I thought it'd be pretty self explanatory. You see blood? You see bean paste or abuse? If the answer to any of those 2 questions is "yes", then it doesn't belong in the non_violent category.
What's to say they are not competing in a race of some sort? {for the family friendly side} Perhaps this is the start/end of a story that's sadly incomplete? {for the non family friendly argument}