The celebrity recruits enter boot camp to find it transformed into a nautical oasis equipped with fish tanks and a live mermaid! For their skill drill challenge, the recruits dive into the world of seafood by solving a recipe riddle to make ceviche. For the main dish challenge, chefs Anne Burrell and Tyler Florence show them how to butcher their own fish and make the classic fish en papillote. The recruits have to replicate their chef's fish but also create their own vegetable side dish. The two recruits that sink to the bottom enter the blind elimination challenge and attempt to cook their way into another week of boot camp.