Do sharks get cancer? Why are nudibranchs so colourful? What are the most ancient living shark species? And why are sharks so important?
Find out in this episode of The Whole Tooth with Isla Hodgson!
Video edited by Luke Saddler
As always, if you have any questions about our oceans, feel free to leave your question in the comments below, or you can submit at https://saveourseas.com/the-whole-tooth/