Pete and Kathie Hayes were thrilled when a  humpback whale began slapping its tail on the surface of the ocean. Pete wrote, “My wife and I have been seeing so many whales from Wild Iris, Sea Ranch, particularly yesterday and today, the 29th and 30th. In addition to spouting, we've seen whales appearing to slap their tails in the water. Often multiple times. First, can you please help us identify what kind of whale this is? And second, can anyone explain why they are doing this?”

Pete sent in a video of the multiple tail slaps, which you can view here.

Humpback whale tail slapping by Peter Hayes

Whale expert, Scott Mercer, confirmed the sighting as humpback whales. I learned as a humpback slaps its tail, the theory is the loud noise causes fish to become frightened, resulting in a tightened school, making it easier for the humpbacks to feed.  It’s also thought to be communication as the loud sound created by the slap can travel long distances underwater. And maybe it’s just fun!

Thanks to Peter for allowing me to share his photo and video with you here.

A few showers this morning, and several rainbows blessed us with their beauty. It's sunny and cool this afternoon. Yesterday's rain was only 0.05 inches at Rick's and my place in Anchor Bay, but in Point Arena Linda Bostwick had 1.10 inches! There were some cells with a LOT of rain in them, while other places only got a splash or two.