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The bayou killifish ( Fundulus pulvereus ) is a small , topminnow - like fish that thrives primarily in the shallow waters off the shores of the Americas , as well as fresh and brackish waters .
 Americas
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Americas