A typical symptom of Crytobia is blindness, most noticeably fish swimming into objects.
Metacercarial infection caused by Diplostomum spp. trematode metacercariae. Typically infects trout and salmonids. It is transmitted Indirectly, cercaria from snail to fish.
Can cause losses if unchecked. Early detection and treatment will enable most cases to be have a high recovery rate.
Preventing the entry of snails to the fish enclosure may disrupt it's life cycle.
Dr. Chacko, Jim
Unity College of Maine
Fish Patholgy Dept.