Climate Lab is a Seattle Times initiative that explores the effects of climate change in the Pacific Northwest and beyond. The project is funded in part by The Bullitt Foundation, CO2 Foundation, Jim and Birte Falconer, Mike and Becky Hughes, Henry M. Jackson Foundation, Martin-Fabert Foundation, Craig McKibben and Sarah Merner, University of Washington and Walker Family Foundation, and its fiscal sponsor is the Seattle Foundation.

UNALASKA, Alaska — The orca pod that forages in the waters just north of this Aleutian island are quick to swarm any halibut boat with a skipper foolish enough to drop lines in their domain.

As the lines are pulled up, and fresh-caught fish near the surface, the whales, in a well-honed feeding ritual, pick them off the hooks.

Skipper Robert Hanson’s lines hav

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