Abstract Morphometric measurements of the Tuntong Laut (B.borneoensis) are essential for identification purposes, estimating age, and determining growth rates that are influenced by habitat conditions. This study aims to evaluate the morphometric characters of various generations of sea tails found in several rivers in Aceh Tamiang (Iyu River and along the Tamiang River, Aceh Tamiang Regency).This research is descriptive exploratory research with survey and interview methods. Morphometric measurements of the young age were carried out on hatchlings that were successfully hatched at the Satucita Lestari Foundation information house. Morphometric measurements of adult individuals were carried out on individuals who were caught using traps. Research activities were carried out in August 2019.The measured morphometric characters included carapace length, carapace width, plastron length, plastron width, body height, head circumference, body weight, tail length, foreleg length, and hind leg length. Based on the morphometric measurements of adult females and males, there is a significant difference in size. Meanwhile, morphometric measurements for hatchlings aged seven months (20 individuals), 1.5 years (14 individuals), and two years (4 individuals) had a more excellent value and had an effect on the increasing age of hatchlings.