Video footage started emerging of a massive lifeform that was on the moon. Designated as "Phosphera", she was a curious beast. She wouldn't harm the rover any time it took a picture of her, but she proved to be very skiddish if the astronauts approached with a small manned craft.
The study team that had been assigned to her found that she was similar to Mothra - but she was mantid in her body structure.
She was capable of deep space flight, but preferred to live on the moon. Her sustenance came from plucking rocks from the moon's surface and crunching them with her mandibles. There seemed to be some form nutrition in the rocks she devoured.
Ironically, this relaunched the "moon is Swiss cheese" joke into the zeitgeist.
Not long after, she was nicknamed "Queen of the Muensters."
Phosphera has never caused issues, she's proven to be docile. The fact that she's most likely been on the moon the entire time that things were going to hell while Godzilla was alive had sparked a meme about her: "Phosphera is such a mood, I also hide in my house all day to avoid conflicts."