Are there non-carbon based life forms near deep sea fissures or theories about there existing?

There has never been a recorded case of any non carbon based life form. In 2010 NASA found a new life form in bacteria in Mono Lake, California, USA. This has been incorrectly labeled as “non carbon based” by some. In actuality, it is carbon based. The remarkable thing about these bacteria is that they contain arsenic instead of the phosphorus that every other life form on Earth contains.