Humpback whales' blowholes are located near the top of their heads. Humpbacks breathe approximately one or two times per minute while at rest, and four to eight times per minute after a exertive deep dive. Whales sleep approximately eight hours per day. They don't experience 'REM' sleep, instead they have to remain partially conscious to breathe. Apparently no 'sweet dreams' for these creatures.
Baleen whales have two blowholes which are located side by side.
Whales cannot breath through their mouths. Humpback whales that summer in Alaska are primarily from the Hawaiian stock of humpback whales. Ventral throat grooves run from their chin to their navel. These grooves enable them to expand during huge intakes of water during 'filter feeding'. Individual humpbacks are identified by their fluke patterns.