May 27, 2015
Humpys in the Strait of Georgia
The Sea Lion left the dock today crewed by Captain Pete and Naturalists Mike and Alex. We had clear skies, a fantastic group of passengers and reports of a humpback whale to the North. We began to see wildlife right outside the harbor with a bald eagle regally perched in a tree and a pod of harbor porpoise close behind the boat. As we motored north we passed several more groups of the little porpoises, which are the most common and smallest cetacean found in the Salish Sea. Unlike their active and exuberant cousins the Dall's porpoise, harbor porpoise are shy, reserved and most active at night when they feed on small fish that make a nightly migration to surface waters.
Once we were in view of Patos island, we began to look out for the spout of our humpback. This spout, or blow, is actually the result of several gallons of seawater that gets trapped above their blowholes. The whales clear this water by exhaling at 300 miles per hour! this massive sneeze vaporizes the trapped water to form the ten to twenty foot "spout" that we typically see.
Despite our knowledge and expertise on what to look for, none of us were expecting what we saw next. I looked out to see a massive tail flailing in the air, coming down with a huge splash! Captain Pete took us toward this spectacle and we realized that there were actually two humpbacks lobbing their tails, or flukes, around in the middle of Georgia Strait. These animals are so massive (up to 45 feet) that barnacles regularly grow on them, especially on the edges of their flukes. Tail lobbing behavior might be a way to try and knock some of those hitchhikers off.
We caught the "tail" end of that show, as after the excitement things settled down. We got to watch and listen to them take some deep breaths and then raise their enormous flukes as they both dove to feed. Humpbacks regularly feed on herring and sandlance (same as the harbor porpoise) and will take several hundred pounds of fish in a single mouthful during a feeding dive!
After a while of watching, we decided to say goodbye to the Humpbacks and make our way back home. We stopped to look at some harbor seals hauled out near East Point, and they looked right back at us!
All in all a great day, had a Whale of a time! (the jokes just get worse from there)
Naturalist Mike J
M/V Sea Lion