Fig. 7. Heavy infestation of tilapia gills by Cryptobia branchialis, SEM. a - swelling of gill filaments and overproduction of mucus, ( b - parasite attachment to gill epithelium.Cryptobia branchialis (Bodonidae: Kinetoplastida)

a - swelling of gill filaments and overproduction of mucus.

b - parasite attachment to gill epithelium. (ssflag 4)