Project Report PR-99-01
Necropsy and Liver Histopathology for Fish Sampled in the Vicinity of Barbers Point Ocean Outfall, Oahu, Hawaii, Febuary 1998
James A. Brock
Fish liver histopathology is an important biological impact that is monitored near the terminus of the Barbers Point Ocean Outfall. In 1998 gross necropsy and fish liver histopathology were conducted on 10 live specimens each of three different fish species: Selar crumenophthalmus, Lutjanus kasmira, and Myripristis spp. Gross evidence of neoplasia was not found in the integument or in the liver of the 30 fish evaluated. Hyperplasia and periductal fibrosis were found in the liver of one S. crumenophthalmus (specimen 98-30A8) and eight L. kasmira (specimens 98-30B1, 98-30B2, 98-30B4, 98-30B5, 98-30B6, 98-30B8, 98-30B9, and 98-30B10). A putative Myxosporea parasite was observed in the gall bladder of nine of the fish. The cause is undetermined for the proliferative response in the biliary system observed in some of the fish.