Is Shibarium on Ethereum?

Excuse me, but I was wondering if you could clarify something for me. I've been hearing a lot about Shibarium lately, and I'm trying to get a better understanding of its underlying technology. Specifically, I'm curious if Shibarium is built on the Ethereum blockchain. Could you provide some insight into this, perhaps explaining why or why not Shibarium chose to utilize the Ethereum network? Thank you for your time and expertise on this matter.