Pola S.T. Panjaitan et al. 2025. Application of GMP and SSOP to the Production of Natural CO Frozen Red Kakap (Lutjanus sp.) Fillets at PT. Alam Jaya Surabaya. Grouper. 16, 1 (Apr. 2025), 1–20. DOI:https://doi.org/10.30736/grouper.v16i1.242.