Fig. (1): Trichodina mutabilis,
Silver imprgnation X40
Fig. (2): Chilodonella hexasticha.
Silver imprgnation X40
Fig. (3): Gyrodactylus rysavyi
1-Prohaptor (2 lobes).
2-Uterus.
3-Embryos.
4-Central hooks.
5-Marginal hooklets.
Fig. (4):Hetrophyhid metacercaria in gill filament (X 100)
1-Oral sucker with circumoral spines.
2-Ventral sucker.
3-Thick fibrious cyst wall.
Fig. (5): Hetrophyhid metacercariae in gill f ilaments (X 40)