National aquariums are large public facilities that showcase a variety of aquatic life, including fish, marine mammals, and invertebrates. They serve as educational centers, promoting awareness about ocean conservation and the importance of biodiversity. Many national aquariums also participate in research and rehabilitation efforts for endangered species. These aquariums often feature immersive exhibits that replicate natural habitats, allowing visitors to experience ecosystems like coral reefs and wetlands. They may also host interactive programs and events to engage the public. Notable examples include the Monterey Bay Aquarium and the National Aquarium in Baltimore.