On the edge of the planet's most active volcano rages an ancient battle for survival.

The waters surrounding the volcanic island of Stromboli teem with a singularly extraordinary animal: the octopus.

With an army of remote and underwater cameras exploring the deep seas of the Mediterranean we follow filmmaker and biologist Natali Tesche-Ricciardi as she and her colleagues uncover the secrets of how the octopus manages to thrive here.

This stunning natural history special will transport you to another dimension, as we dive deep below Octopus Volcano.