eng Enviro Research Publishers Current Research in Nutrition and Food Science Journal 2347-467X 2322-0007 2026-04-10 14 1 251 264 10.12944/CRNFSJ.14.1.16 25742 article Erniati 1 Yudho Andika 1 Muliani 2 Novi Safriani 3 Erlangga 1 Imanullah 1 Department of Marine Science, Universitas Malikussaleh, North Aceh, Indonesia Department of Aquaculture, Universitas Malikussaleh, North Aceh, Indonesia Department of Agricultural Product Technology, Syiah Kuala University, Banda Aceh, Indonesia Postgraduate School, Brawijaya University, Malang, Indonesia Aceh is one of the provinces in Indonesia with a large sea area. This condition makes Aceh diverse in marine and fishery resources, including the Crassostrea gigas oyster. Currently, data on morphometric measurements to identify and develop C. gigas oyster commodities is still very limited. Therefore, this study aims to analyze the morphometry, habitat, and proximate composition of C. gigas oysters in the waters of Aceh. C. gigas oyster samples were collected by freely traversing various suspected oyster habitats. The search was carried out by checking for oysters attached to mangrove vegetation, wood, bridge iron, and rocks. A total of 50 C. gigas samples representing the entire population were used for morphometric analysis and nutritional composition. These water quality parameters were measured in situ with 5 repetitions, and measured where C. gigas was found. Length of C. gigas is 42.4 ± 11.6 mm, width is 29.5 ± 8.5 mm, thickness is 16.2 ± 5.7 mm, total weight is 13.1 ± 9.3 g, and meat weight is 1.4 ± 1.2 g. The effect of the length of C. gigas on the total weight of C. gigas is 51.2 %. Habitat parameter values: temperature is 31.7 ± 3.5 ^oC, salinity is 27.8 ± 5.8, pH is 8.0 ± 0.4, DO is 7.6 ± 2.3 mg/l, turbidity is 32.5 ± 28.0, and the substrate is muddy and sandy. Ash content is 7.2 ± 3.4 %, moisture content is 8.9 ± 4.4 %, protein content is 51.0 ± 9.9 %, fat content is 12.9 ± 3.2 %, and carbohydrate content is 20.0 ± 7.9 %. PCA analysis showed that salinity, DO, and pH parameters were more important than other parameters for the nutritional composition of C. gigas. https://www.foodandnutritionjournal.org/volume14number1/relationships-between-habitat-conditions-morphometry-and-nutritional-composition-of-the-pacific-oyster-crassostrea-gigas-in-aceh-waters/ Aceh C. gigas Habitat Morphometry Nutritional Waters