Video: Humpback whale kisses a catamaran.

In Australia, a humpback whale delivers an “approval kiss” to a catamaran.

A humpback whale was documented “kissing” the bottom of a catamaran in Queensland, Australia, after emerging between the sailboat’s pontoons.

Captain Peter Lynch said passengers aboard the 33-foot sailboat “saw her smoothly go under the ship and go vertically in there. We were on the back steps looking into the tunnel.”