Fresh water is essential to life on Earth. All land-dwelling creatures need fresh water to survive. Freshwater animals depend on clean water to survive, and The Nature Conservancy works to protect the planet's freshwater resources, and the freshwater animals that depend upon them.
Freshwater dolphins are rare, and becoming rarer. The dolphins of the Amazon are under threat.
Like its cousin the saltwater crocodile the American alligator is a formidable predator, and is elusive, despite its large size.
These playful creatures need healthy rivers to survive, as do their much larger relations, the giant otter of South America.
The annual migration of these geese by their millions is one of Planet Earth's most impressive natural wonders.
These giants of Africa's rivers can be remarkable dangerous, especially to people who come too close in small boats.