Welcome back to the Whole Tooth, a podcast all about sharks, rays and the oceans. This week, host Isla is joined by deep-sea shark researchers Sofia Graça Aranha and Paul Clerkin to explore the depths, and meet some of the fantastical, alien-like and perfectly adapted sharks, rays and skates that live there. And, just how much they need our protection.

Follow Sofia and Paul's work on instagram: @sofiagracaaranha and @paul_j_clerkin

Find us on @saveourseasfoundation (insta) and @saveourseas (twitter), or head to www.saveourseas.com to find out more about our work.