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The densest and most spectacular reefs are found to the seaward of Key Largo ( in and beyond John Pennekamp Coral Reef State Park ) and Elliott Key where the two long keys help protect the reefs from the effects of water exchange with Florida Bay , Biscayne Bay , Card Sound and Barnes Sound .
 Key, Key
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Key, Key