Giant otter

The giant otter is a big, chatty member of the weasel family found in South America's rivers. These sleek swimmers live in tight-knit family groups and are active only during the day. Their noisy calls and strong social bonds make them stand out among otters.

• Grows up to 1.8 meters long, making it the largest weasel family member.
• Lives in cooperative family groups of 3-8 led by a breeding pair.
• Uses distinct vocal sounds to signal danger, threats, or comfort.