Yi-Kai Tea, a biodiversity research fellow at the Australian Museum in Sydney, has amassed a social media following as @KaiTheFishGuy for his sassy writing and gorgeous photos of fish and other wildlife. Kai recently returned from an expedition aboard an Australian research ship to explore the deep seas surrounding a new marine park in the Indian Ocean. Led by the Museums Victoria Research Institute, dozens of scientists aboard mapped the ocean floor and, using nets dropped to as deep as six kilometers, gathered thousands of specimens, ranging from the utterly adorable deep sea batfish to the terrifying highfin lizardfish to the unfortunately named bony-eared assfish. Today on the show, Kai takes host Aaron Scott on a tour of the ocean floor and the fantastical creatures that call it home. "They are masters of the realm," says Kai. "You can't live in 3,000 meters of water and not be a master at what you do. And the fact that these creatures are living down there, thriving and making the most out of these habitats, that's a remarkable feat."