Photographs by Dr. Panos Varvarigos ©

Fish Disease Diagnosis and Control in the Mediterranean Marine Aquaculture
Lecture notes by Dr. Panos Varvarigos presented at the advanced course for professionals organised by CIHEAM-IAMZ, University of Santiago de Compostela, Spain (13-24 September 2004).


Examples of parasitic protozoa, found on fish gills, without host specificity.

Amyloodinium ocellatum trophonts seen here on caged sea bass gills.

Ichthyobodo necator (Costia necatrix) (left) is often found on the gills of young juveniles in the hatcheries in cases of inefficient incoming water treatment (filtration). Cryptobia branchialis (right) is a common gill parasite of caged fish, especially when the cage netting is not frequently changed.

Trichodina spp. is a common gill parasite of caged fish, when the cage netting is fouled.

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Author: Dr. Panos Varvarigos
Freelance Veterinarian - Fish Pathologist, Athens, Greece.


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