Nowadays the dolphins live mainly in the rivers and waterways of Kratie and Stung Treng provinces. The number of these mammals is estimated to be between 40 and 60 and they are often seen travelling in small groups of 6 to 10 individuals. The females usually give birth to young once every two years most often during the months of June to August. The young dolphins are about 1m in length at birth and suckle milk. By adulthood the dolphins can attain a length of over 2.5m and weigh up to 180kg. Their diet consists mainly of small fish, shellfish and snails. The dolphins can swim at speeds up to 40km per hour and stay submerged for periods between five and ten minutes.