* Tropical freshwater ecosystems: They prefer clear, fast-flowing rivers and streams with abundant fish and other prey.
* Rainforests and wetlands: They are found in the Amazon rainforest, as well as other tropical rainforests and wetlands in South America.
* Dense vegetation: Giant river otters use the dense vegetation along the riverbanks for shelter and raising their young.
* Abundant prey: They require a plentiful supply of fish, crustaceans, and other aquatic prey to survive.
Specifically, they are found in these countries:
* Bolivia
* Brazil
* Colombia
* Ecuador
* French Guiana
* Guyana
* Peru
* Suriname
* Venezuela
They are adaptable animals, but their habitat is essential for their survival.