<p><br> Scientists aren't sure why whales breach. Some say it's to clean off parasites. Others say it's just for fun.</p>

Humpback Whale Breaching


Scientists aren't sure why whales breach. Some say it's to clean off parasites. Others say it's just for fun.

Photograph courtesy NOAA

Whales

See whale pictures (including right whales, humpback whales, sperm whales, and more) in this photo gallery from National Geographic.

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