Case Report of a Non-Infectious Degenerative Myopathy in Captive-Bred Clownfish (Amphibrion clarkii)
IAAAM 2000
Allen C. Riggs1, DVM, MS; RuthEllen C. Klinger1,2, MS; Ruth Francis-Floyd1,2, DVM, MS, DACZM
1Department of Fisheries and Aquatic Sciences, University of Florida, Gainesville, FL, USA; 2Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA

Abstract

Captive-bred clownfish (Amphibrion clarkii) began exhibiting atypical bottom-sitting behavior at 6.5 mo of age. No mortalities occurred but morbidity gradually affected approximately 20% of the 300 fish kept in this 40-gallon closed system. Water chemistry parameters, wet mount biopsies and routine bacterial culture/sensitivities from necropsied individuals were not remarkable. Routine H&E histologic examination revealed a severe diffuse rhabdomyopathy exhibiting myolysis without concurrent lymphocytic or heterophilic inflammatory infiltrates. Special stains for routine infectious agents were negative. These histopathologic changes are consistent with those found in piscine nutritional muscular dystrophy as reported in other fish species.

Speaker Information
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Allen C. Riggs, DVM, MS


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