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Abstract
The present study was carried out experimentally on
(220) marine fish Mugil seheli (sehlaia) .The fish were
acclimated for one week, then subjected to different
concentration of water-soluble fractions of (l %, 5% and 100/0).
The study revealed abnormal behavior such as rapid
movement of gill operculum, abnormal swimming, fin and tail
rot and twisting of vertebral column were appeared after one
month. The internal organs of Mugil seheli examined
showing erosion and sloughing of gills, congestion and
hepatomegally. While, the gall bladder appeared enlarged and
filled with oily liquid, congestion or spleen, enlarged with
congestion and diffuse hemorrhage of heart and kidney but the
intestine was filled with black DROPlets or oil .Thc
histopathological examination showed that, the gills were
congested and hemorrhage occur with epithelial desquamation
of the secondary lamellae and mononuclear cell infiltration.
The liver showed parenchymal edema and hemorrhage. Most
of hepatic cells were necrotic. The intestine revealed mucinous
degeneration .and focal desquamation in their epithelium
together with edema and hemorrhage. Some leukocytic
infiltration in the lamina propria and submucosa were
observed. The kidneys exhibited marked tubular nephrosis.The
muscle revealed interamusclar edema,congestion ,hyaline
degeneration and zenker’s necrosis at long exposure to water-
soluble fractions. Mugil seheli after exposed to 1 % water-
soluble fraction of crude oil for three months and their no
dectectable ectoparasite. Oil pollution was highly toxic effect
on Mugi! schcli where, the mortality percent reach to (I OO(Yo)
even at low concentration ( 20%) through 8 hours in absence
of oxygen. While, in presence of oxygen the mortality percent
was (0%,10% ,40% ,60% and 100%) at 0, 10, 20, 40, 60, 80
and 100% water- soluble fractions concentrations respectively.
The LC50, which was 482.97 J.1g / L. . After exposed fish to
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