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![Humpback whale flukes fish9712.jpg Humpback whale flukes](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_fish9712.jpg?itok=gQQBbgxt)
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Humpback whale flukes. Individual humpback whales can be identified by blackand white patterns found on the undersides of their flukes. A great number ofwhales can be identified, catalogued, and resighted through opportunisticsnapshots. A significant non-harassing tagging technique. (Image credit: NOAA Central Library Historical Fisheries Collection | Scott Kraus)