Which episode does Amaimons familiar die in blue exorcist?

Amaimon's familiar, the giant, slimy worm called "Shima", doesn't actually die in the anime or manga of Blue Exorcist. He continues to be Amaimon's familiar and even plays a role in later events.

It's possible you're thinking of a different character or a different event in the series. Could you please provide more context or clarify what you're looking for?