The smallest otter species is the Asian small-clawed otter (Aonyx cinereus), measuring in at 65-90 cm (25-35 inches) long, including tail. Unlike most other otters, their front feet are only partially webbed, which along with their short claws contributes to their extreme dexterity. They're known for being playful, charismatic, and social.

Small-clawed otters are considered vulnerable by the IUCN. In addition to threats like habitat loss, reduced food supply, and climate change, these otters are also increasingly impacted by the illegal pet trade.