Project Report PR-99-12
Necropsy and Liver Histopathology for Fish Sampled in the Vicinity of the Sand Island Ocean Outfall, Oahu, Hawaii, October 1998
James A. Brock
March 1999
ABSTRACT
Fish liver histopathology is an important biological tool used to assess fish for exposure to pollution. In 1998 gross necropsy and fish liver histopathology were conducted on 10 specimens each of three different fish species: Selar crumenophthalmus, Lutjanus kasmira, and Myripristis spp. These fish were collected live near the terminus of the Sand Island Ocean Outfall, Oahu, Hawaii. Two of the S. crumenophthalmus had a focus of early bile duct hyperplasia. Putative Myxosporidea spores were observed in the gall bladder of two other S. crumenophthalmus. Four of the L. kasmira had several putative Myxosporidea spores within bile ducts of the liver. Gross or microscopic evidence of neoplasia was not found in the liver of the 30 fish evaluated.