10776
Some of the deep-water cichlids ( e.g. , " Bathybates " , " Gnathochromis " , " Hemibates " and " Xenochromis " ) have been caught in places virtually devoid of oxygen , but how they are able to survive there is unclear .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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