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Surgical intervention on cetaceans is rarely performed due to challenges including general anesthesia and post-operative wound healing. This report describes the evaluation and treatment of an adult female bottlenose dolphin (Tursiops truncatus) with the US Navy Marine Mammal Program, with a chronic ventral cervical abscess caused by Candida glabrata. Despite aspiration and lavage along with multiple antifungal drugs, the patient developed inspiratory stridor with decreased performance level and surgical treatment was pursued. Under general anesthesia with the dolphin in dorsal recumbency position a 12-cm longitudinal ventral midline neck incision was used for exploration. Intraoperative ultrasound aided the identification of surgical landmarks and the abscess cavity. After adequate drainage and curettage, a closed-suction drain was placed in the surgical site. Retention sutures were used to close the incision and the external drain bulb was secured to a pectoral fin strap. One-year post-op, the dolphin was clinically normal and follow-up imaging showed no significant recurrence of the abscess. This case demonstrates a novel surgical approach of managing abscesses in dolphins, including placement and management of a negative suction drain in a submerged patient. The successful collaboration between veterinary anesthesiology, veterinary medicine, radiology, and general surgery allowed the patient to continue her normal activities as a full-duty service member. [ABSTRACT FROM AUTHOR]