The massive saltwater aquarium at EPCOT’s "The Seas with Nemo & Friends" pavilion is one of the largest man-made ocean environments in the world, with a depth that reaches approximately 27 feet (8.2 meters) in its deepest sections. The circular tank holds a staggering 5.7 million gallons of saltwater and is home to thousands of sea creatures, including sharks, sea turtles, stingrays, and dolphins. The walls of the tank are made of massive acrylic panels that are roughly 8 inches thick to withstand the immense pressure of the water. For perspective, the tank is so large that the iconic "Spaceship Earth" geosphere could almost fit inside it. Visitors can view the marine life through multiple levels of observation windows or by dining at the Coral Reef Restaurant, which offers "underwater" views of the coral reef ecosystem. For the most adventurous guests, Disney offers "EPCOT Seas Adventures," including a scuba diving experience (DiveQuest) that allows certified divers to descend into the 27-foot depths and swim alongside the marine life. The depth and volume are carefully maintained to provide a healthy, stable environment that mimics a real Caribbean reef, supporting both the animals and the complex life-support systems required to keep the water crystal clear.