Kavachi Volcano has also been dubbed "Sharkcano" because in 2015, when the volcano was in a lull period of activity, an expedition to the area found there were two kinds of sharks, including hammerhead sharks, living near the crater. This came after a 2008 study found the volcano was constantly spewing volcanic particles and fragments into the water, making the environment acidic and "superheated," with temperatures reaching 100 degrees Fahrenheit (37c)