It's a yellow coral just three inches tall, that's been named Chromoplexaura cordellbankensis.
The species of coral was first spotted in 2004 near Point Reyes National Seashore. But it was left untouched.
Last year, a research team with the California Academy of Sciences in San Francisco found it again and brought it up to the surface.
Scientists put it under a microscope and found it was different from any other coral species.
The discovery was published this week in the Proceedings of the California Academy of Sciences.
See that unassuming little deep-sea octocoral lower-right? We're proud to welcome Chromoplexaura cordellbankensis—discovered by our own Gary Williams in the Cordell Bank National Marine Sanctuary—to Earth's (known) tree of life! https://t.co/TokpbsnOCo @sanctuaries pic.twitter.com/x7vaTIeb26— CA AcademyOfSciences (@calacademy) May 15, 2019