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Henneguya zschokkei is found in fish as an ovoid spore with two anterior polar capsules and two long caudal appendages. [6] Individuals are very small (about 10 micrometers in diameter), [7] but are found aggregated into cysts 3–6 mm in diameter at any place in the animal's musculature.
These small fish maintain so-called "cleaning stations" where other fish, known as hosts, will congregate and perform specific movements to attract the attention of the cleaner fish. [26] Cleaning behaviours have been observed in a number of other fish groups, including an interesting case between two cichlids of the same genus, Etroplus ...
Due to the low host specificity of the parasite, Ich infection is known from all freshwater fish systems examined. However, the susceptibility and the impact differ between host species. Rainbow trout , catfish and eels are highly susceptible fish species and uncontrolled infections lead to almost 100% mortality.
Miamiensis avidus is a species of unicellular marine eukaryote that is a parasite of many different types of fish.It is one of several organisms known to cause the fish disease scuticociliatosis and is considered an economically significant pathogen of farmed fish. [2]
Enteromyxum leei was formerly described as Myxidium leei, [4] and initially reported in cultured gilthead sea bream (GSB) (Sparus aurata) from southern Cyprus.The morphology of the myxospores of this parasite differ slightly from others of the family Myxiidae: the polar capsules are located terminally and are elongated rather than subspherical (as in Myxidium), but they open to one side and ...
Microsporidia is a common cause of disease in fish and so xenomas tend to be seen more frequently in fish than in other organisms. A paper published in 2002 listed 15 genera and 157 microsporidian species that cause disease in fish, [ 2 ] [ 12 ] however only ten of these genera induce xenoma formation. [ 8 ]
The parasite apparently does not cause much other damage to the host fish, [2] but Lanzing and O'Connor (1975) reported that infested fish with two or more of the parasites are usually underweight. [8] Once C. exigua replaces the tongue, some feed on the host's blood and many others feed on fish mucus.
Brooklynella hostilis is a parasite of marine fish, found in wild fish, farmed fish and aquariums. [1] It is kidney-bean shaped, and approximately 60–80 μm (0.0024–0.0031 in) long, [1] with bands of cilia. [2] It reproduces by binary fission. [3] B. hostilis causes the disease Brooklynellosis, also known as slime-blotch or clownfish ...