Pneumonia Pada Lumba-Lumba Hidung Botol (Tursiops aduncus) di Bali Exotic Marine Park = Pneumonia in a Bottlenose Dolphin (Tursiops aduncus) at Bali Exotic Marine Park

Pneumonia is a respiratory disease that can cause severe respiratory impairment in marine mammals. This case report aims to describe the diagnosis, treatment, and pathological findings of an Indo-Pacific bottlenose dolphin (*Tursiops aduncus*) named Leo at Bali Exotic Marine Park. The diagnosis was established based on anamnesis, clinical examination, hematological and blood chemistry analyses, thoracic ultrasonography, bacterial isolation and identification, and was further supported by necropsy and histopathological examinations. The patient presented with lethargy, anorexia, increased respiratory rate, and shallow breathing. Hematological examination revealed leukocytosis and neutrophilia, while blood chemistry analysis demonstrated mild hypoalbuminemia, increased blood urea nitrogen (BUN), alanine aminotransferase (ALT), and total bilirubin. Thoracic ultrasonography revealed pulmonary changes consistent with pneumonia, while bacterial isolation identified *Staphylococcus* sp. and *Bacillus* sp. Treatment consisted of antibiotics, anti-inflammatory drugs, diuretics, albumin, hepatoprotective agents, antioxidants, and nutritional support. Despite intensive treatment, the patient's condition progressively deteriorated, ultimately resulting in death. Necropsy and histopathological findings, including pulmonary edema, inflammatory cell infiltration, and pulmonary abscesses, confirmed the diagnosis of pneumonia. This case demonstrates that pneumonia in dolphins can progress rapidly and result in fatal respiratory dysfunction. Pneumonia merupakan penyakit respirasi yang dapat menyebabkan gangguan pernapasan serius pada mamalia laut. Laporan kasus ini bertujuan mendeskripsikan diagnosis, penanganan, dan temuan patologi pada lumba-lumba hidung botol Indo-Pasifik (Tursiops aduncus) bernama Leo di Bali Exotic Marine Park. Diagnosis ditegakkan berdasarkan anamnesis, pemeriksaan klinis, hematologi, kimia darah, USG thoraks, isolasi dan identifikasi bakteri, serta didukung oleh pemeriksaan nekropsi dan histopatologi. Pasien menunjukkan gejala letargi, anoreksia, peningkatan frekuensi pernapasan, dan pernapasan dangkal. Pemeriksaan hematologi menunjukkan leukositosis dan neutrofilia, sedangkan kimia darah menunjukkan hipoalbuminemia ringan, peningkatan BUN, ALT, dan total bilirubin. Pemeriksaan USG thoraks menunjukkan perubahan paru yang konsisten dengan pneumonia, sementara isolasi bakteri mengidentifikasi Staphylococcus sp. dan Bacillus sp. Penanganan dilakukan melalui pemberian antibiotik, antiinflamasi, diuretik, albumin, hepatoprotektor, antioksidan, dan dukungan nutrisi. Meskipun telah diberikan terapi, kondisi pasien terus memburuk hingga mengalami kematian. Temuan nekropsi dan histopatologi berupa edema pulmonum, infiltrasi sel radang, dan abses paru mengonfirmasi diagnosis pneumonia. Kasus ini menunjukkan bahwa pneumonia pada lumba-lumba dapat berkembang secara progresif dan menyebabkan gangguan respirasi yang fatal.