Mutant sharks living inside deadly ‘Sharkcano’ revealed as Nasa reveals jaw-dropping eruption photo

: "Populations of gelatinous animals, small fish, and sharks were observed inside the active crater, raising new questions about the ecology of active submarine volcanoes and the extreme environments in which large marine animals can exist."

The sharks were described as "mutants" as they were able to survive in the acidic conditions that should have killed them.

The two species spotted were the silky shark and the hammerhead and we've rounded up key facts about each below.

Silky sharks

Mutant silky sharks were spotted living in the sharkcano way before its explosion.

They get their name because of their smooth skin.

They're slender with small dorsal fins and can grow over eight feet.

You can usually find the silky shark in tropical waters all over the world.

Silky sharks have very sharp teeth and could attack a human if they wanted.

However, a silky shark attack is a very rare event as humans aren't usually in their habitat.

Hammerhead shark

Hammerhead sharks get their name from their unusually shaped heads.

They can grow much bigger than silky sharks and some reach around 20 feet long.

They're also found in warmer waters all over the world and like to swim together, which is unusual for sharks.

Hammerheads hunt alone at night and usually eat fish, octopuses, and squid.

They wouldn't actively hunt a human but will attack you if provoked.