Borneo from Below’s latest weekly episode is now online. This week features the subject of symbiosis and the underwater creatures around Borneo that participate.

“Ever wondered how fish manage to clean their teeth despite having no hands? In episode 23 of Borneo From Below, Bertie answers this and a whole host of other fascinating questions as he goes on a voyage of scientific discovery learning all about symbiosis on tropical reefs.”

Watch the full episode here.