insect/louse-like

Salmincola
Numerous Salmincola copepods on gills of rainbow trout
Copepods
Sealice and feeding scars on skin of salmon.
Salmincola
Salmincola adults on gills of salmon.
Copepods
Adult sea lice (copepods) on gills of salmon.
non-pathogen injury...
Bass with grass seed embedded in gill.
none
Stomach contents of bluegill.
Lernaea (anchor worm...
Adult anchor worm protruding from the head of its host.
Salmincola
Salmincola adults on gills of trout.
Copepods
Adult sea lice on fish skin.
Clinostomum (Yellow...
Yellow grub in flesh of bluegill.