flattened heads with rounded ears — making them look more like otters or weasels than cats. They live in lowland areas with dense vegetation to hide in, including in scrublands, swamps and forests.

Meet the chungungo — also known as the marine otter and sea cat — the smallest sea otter in the world. The chungungo rarely grows beyond 45 inches (114 centimeters) in length and weighs just 6 ...