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Myxosporeans ( Myxozoa ) are eukaryotic parasites , primarily of fish , whose classification is in a state of flux as taxonomists attempt to synthesize the traditional morphology - based system with emerging DNA sequence - based phylogenies .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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