Oceans dominate the world's weather systems while supporting a wide range of life.
Mountain ranges, perpetual night, pressure and temperature extremes create unusual life forms.
Life on the edge of frozen seas near the North and South poles.
Plankton use sunlight as an energy source in temperate-sea habitats.
Examining the fragile ecosystems and colorful life surrounding coral reefs.
Predators utilize marshes created by tides; finback and humpback whales; sand crabs; surfing snails; dolphins.
Breeding forces animals to come onto land; eagles; marine iguana; Olive Ridley turtles; killer whales hunt sea lion pups; rockhopper penguins.