Scientists are using specially constructed underwater robots to study extremely rare sharks that live in one of the harshest environments on planet Earth - inside a submarine volcano.
The incredible sharks were discovered by chance as recently as 2015 in the violent Kavachi volcano in a remote part of the Solomon Islands.
Scientists observing volcanic activity spotted the sharks in the deep sea near the islands in the South Pacific. What first appeared to be an unidentifiable large brown blob was later revealed to be a Pacific sleeper shark. The sighting is the southernmost of the species ever documented.
At first researchers were baffled by what they’d found as they didn’t think anything other than bacteria could live in such extreme conditions.
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