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A marine biologist in Monterey, California, amazed her followers by creating a horn out of a long stem of bull kelp. Footage shows Polina Kritchko, a marine biology graduate from the University of Washington, wielding a stem of bull kelp. Holding one end in the air, Kritchko blows into the other, producing a long, horn-like tone. Kritchko told Storyful: "Bull kelp is hollow in the middle so if you blow into it, it creates a horn sound. If you try this, please be mindful of your surroundings and be sure not to disrupt your local ecosystem. "Any piece of bull kelp works! Just make sure you pour out any water left in it so you don't get a mouthful of kelp water!" https://www.montereybayaquarium.org/animals/animals-a-to-z/bull-kelp#:~:text=Bull%20kelp%20is%20an%20annual,drop%20to%20the%20ocean%20floor Bull kelp is a plant native to the Pacific Coast from Alaska to Southern California. Its stems can grow up to 60 feet long, with the whole plant growing up to 115 feet. (Footage by Polina Kritchko/Storyful via Getty Images UGC)