The peritoneal cavity and portions of viscera of a giant moray eel (Gymnothorax javanicus) were exposed due to ca. 10 x 6 cm irregularly shaped, penetrating avulsion at the midventral abdominal area allegedly due to a bite by a conspecific on exhibit at the S.E.A. Aquarium, Resorts World Sentosa (RWS) in Singapore. Bleeding was not observed. Tricaine methanesulfonate (MS-222) immersion at 100 mg l^-1 was administered to achieve stage III anesthesia. A ca. 10 x 4 cm subfascial skin flap was severed. Abdominal lavage was performed using 1% enrofloxacin in sterile water injection. The abdominal cavity was closed by suturing the peritoneum and muscle layers using 3-0 and 2-0 nonabsorbable, monofilament suture, respectively. The skin was left open to heal. Enrofloxacin (10 mg kg^-1 bodyweight IM SID x 7 days) and carprofen (4 mg kg^-1 body weight, SC SID x 3 days) were administered postprocedure. Debridement of surgical site using saline, dry gauze, and Vetericyn® HydroGel spray was done EOD x 10 days. Complete healing was achieved at 21 days as evidenced by the absence of bleeding or inflammation, and formation of granulation tissue and normal vascularization.