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It's not a sharknado, but it just might be a sharkcano. Scientists recently found a sleeper shark living in an area that he wasn't supposed to be: in a volcano. The Kavachi is a very active underwater volcano in the Solomon Islands near Papua New Guinea, and when scientists sent down camera-laden robots to examine the volcano, they discovered far more than they expected.
Brennan Phillips, a University of Rhode Island Ph.D. student, was on this scientific expedition and described the scientists' reactions when they found multiple species of animals living in the volcano: "We were freaking out."

Of importance to Phillips and the other researchers is how these animals live in such a hot, acidic environment. The scientists sent robots down because "Divers who have gotten close to the outer edge of the volcano have had to back away because of how hot it is or because they were getting mild skin burns from the acid water," Phillips explained.