The study was conducted to assess the length-weight relationships of Anodontia edentula from mangrove habitats of Surigao City, Philippines. A total of 180 individual clam species used to determine the relationships of shell length (SL), shell height (SH), and shell width (SW) with the total weight (TW) and soft-tissue weight (STW). The paired variables on SL-TW, SH-TW, SL-STW, and SH-STW showed positive allometric growth with b-values ranging from 3.1484 to 3.3798. The relationship of the shell width to the total weight (b=2.6402) and shell width to soft-tissue weight (b=2.7684) showed a negative allometric pattern indicating the growth in shell width is faster than its weight. It implies that the larger the species, the smaller its soft tissue. The highest correlation values recorded were in SH – TW (r2=0.9372), and SH – STW (r2=0.8701) relationships denote that shell height is a good weight growth estimator for A. edentula from the mangrove habitats of Surigao City, Philippines. Further studies along this line may be conducted for the conservation, management, and production of A. edentula species.