0 was
identified as infecting scales. Myxobolus spinacurvatura Maeno, Sorimachi. Ogawa & Egusa, 1990 was
identified as parasitizing the mesenteric vessels. Myxobolus bizerti n. sp. was discovered in the gill
f~laments, while h4j/xobolus ichkeulensis n sp. was found in the gill arches. Data concerning morphology,
dimensions, scanning electron micrographs of the spores and ultrastructure of pansporoblast
are presented.