Morphology Adults are as large in diameter as 1 mm Macronucleus is a large, horseshoe-shaped body that encircles the tiny micronucleus 3 life stages: Feeding stage: trophont/trophozoite Reproductive stage: tomonts/tomites Infective stage: trophozoites/tomites/theronts/swarmers
Geographic Distribution: It is wide spread in all freshwater fish but appears to be more common in aquarium fish, possibly due to the closer contact and stress involved with aquarium species. Definitive Hosts: All freshwater fish Intermediate Hosts: None
Life Cycle Feeding stage: trophont/trophozoite Attached to the epithelial cells and absorbs nutrients from the fish Reproductive stage: tomonts/tomites Quickly attaches to a substrate and encysts Spends all of its energy rapidly multiplying Infective stage: trophozoites/tomites/theronts/swarmers Tomites have burst from cyst Sprout cilia and immediate start looking for a host Typically only have a few days to find a host or they perish
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