Nugget's feed

I've been seeing this everywhere on YouTube and I haven't been able to find out the title (since the videos are mostly in another language)

But it shows this researcher(?) In front of a glass tank and inside is a mermaid staring back at him, then another mermaid or merman shows up, takes her and hugs her or whatever

Then he straight up decapitates her and takes her place in front of the researcher because beautiful fishman likes the researcher and doesn't want others to be with him pleASe I haven't been able to find out what it is I'm going crazy-

（/TДT)/