The Asian small-clawed otter is mostly active after dark. It lives in groups of up to 15 individuals.In the Bangladesh Sundarbans, 53 individuals were recorded in 351 km (218 mi) of water courses in 13 locations between November 2014 and March 2015. Group size ranged from one to 12 individuals.Group members communicate using 12 or more distinct calls, and utter a variety of yelps and whimpers. When disturbed, they scream to rally the help of others.