Robbie Shone, who accompanied us on a recent trip to photograph the Cueva del Azufre in Mexico, was featured on National Geographic Weekend. On this radio show, he talked about his experiences working in one of the most poisonous caves in the world, and of course, about its fishy inhabitants. To listen to the whole interview, check out National Geographic Weekend on Soundcloud. On the right is a shot of Robbie’s assistant, Magik Matt, marveling at sulfuric acid producing bacteria hanging from the cave ceiling.