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The Youtube video trends known as “Moar Krabs” and sometimes “Morbid Krabs” are a part of the larger mass of Spongebob-related Youtube Poop videos. Often, the song “Gentle Breeze” is used, which was later borrowed by the Squidward YTP meme.
KYM user Plasquatch describes it like this:
At first, the mutated image appears to be Spengbab-like fanart. However, it actually comes from the season 2 SpongeBob episode “Jellyfish Hunter.” It appears for less than a second during a montage in which SpongeBob catches jellyfish for Mr. Krabs, who constantly demands “more.”