Free Online HD on Lookmovie. Hundreds of coastal islands and salt marshes exist along the Atlantic Ocean coast. These areas are constantly exposed to turbulence, shifts in currents, and violent storms. Many of these places appear uninhabited, yet these marshes are home to millions of wonderful, unique animals. National Geographic reveals the secrets of the food chain and shows how nature creates refuge for some of the most vulnerable animals. Let's discover the hidden life on the ocean's shores.