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Fish , or freshwater shrimp such as " Caridina multidentata " and " Neocaridina davidi " , are usually selected to complement the plants and control algae , but for reasons of minimalism the number of species are often limited .
 Caridina multidentata
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
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Text: {0} 
Answer:
 Caridina multidentata