Surface view of an adult female humpback whale’s hemispherical lobe and mammary slits. This whale surfaced in close proximity to our boat multiple times, rolling over so her belly was facing up and her mammary slits and hemispherical lobe exposed at surface for an extended period of time. She exhibited this and other social behaviour repeatedly, as if displaying. She was with another adult whale. My guess is that the other whale was male. Prominent are Coronula diadema acorn barnacles, which are found only on humpback whales, and Conchoderma auritum gooseneck barnacles, which are found only on Coronula diadema barnacles.
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