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What's it like to be at the bottom of the food chain, where the odds of survival are 1 in 20,000? Immerse yourself in a world of mud-dwellers, bottom-foragers, algae-eaters and expert predators all fighting for survival in Florida's Indian River Lagoon. Host Peter Schriemer takes you on a journey through this 156-mile inland waterway where Smithsonian biologists are working to unlock the secrets of a hidden world. What they learn will help us better understand how to protect and preserve this aquatic wonder.