Butterfly fish feed in Acropora cytherea coral in the waters of Johnston Atoll National Wildlife Refuge in the Pacific. (Jim Maragos/USFWS)
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<p><a rel="nofollow" class="external text" href="https://www.flickr.com/photos/usfwshq/5123998092/">Butterflyfish at Johnston Atoll NWR</a>
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