What chain is Injective on?

Could you kindly explain to me, which blockchain network does the Injective Protocol operate on? I've been hearing quite a bit about its decentralized exchange capabilities and am curious about its underlying technology. Is it built on Ethereum, perhaps, or does it utilize a different blockchain entirely? I'm eager to understand the specifics of its infrastructure and how it fits into the broader cryptocurrency ecosystem. Thank you for your assistance in clarifying this matter for me.