Confusion?

orca dorsal fin
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humpback pectoral fin
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On a clear whale watching day these two photos would not be confusing. One of a killer whales approaching the boat and the other of a humpback when it is rolling on it’s side and showing its pectoral flipper. But on a foggy day or from a distance without binoculars many guides have confused the pectoral flipper for a dorsal fin and made a radio call to claim a pod of orca only to have to admit the error. Either picture on it’s own is excellent the confusion is only embarrassment.