A real life sharkcano? Ocean engineer Brennan Phillips led a team to the remote Solomon Islands in search of hydrothermal activity.
They found plenty of activity—including sharks in a submarine volcano. The main peak of the volcano, called Kavachi, its first recorded eruption was in 1939, and the most recent eruption occurred in January of 2014, and was not erupting during their expedition, so they were able to drop instruments, including a deep-sea camera, into the crater.
The footage revealed hammerheads and silky sharks living inside, seemingly unaffected by the hostile temperatures and acidity.