Tail lobbing is an activity where the whale (usually humpback) sticks it's tail out of the water and repeatedly slams it on the surface. Take your palm and slap the surface of the water sometime. Makes a pretty loud smack, doesn't it? Imagine a tail, 16' across. Makes a very loud noise! This humpback decided the usual way wasn't good enough, so it rolled over to do several inverted tail lobs. Yes, you are looking at the underside of the humpback! Another in the background was doing the same thing, I guess it's more fun as a group activity! This one is Nile, a female we believe is pregnant, Barb, a male, is in the background.