Looks like salmon and steelhead habitat has been traded for something else.

https://www.fisheries.noaa.gov/feature-story/protecting-critical-value-nearshore-habitat


More than 95 percent of the most valuable nearshore habitat in Puget Sound is gone and is especially scarce in the south Sound, according to an analysis by the Puget Sound Nearshore Ecosystem Restoration Project. Scientists described it as a “dramatic change in the historic occurrence [of] these once-prominent nearshore ecosystems.”

Fewer than one percent of Puget Sound Chinook salmon juveniles that migrate to the ocean each year survive to return as adults. That means that already imperiled populations continue to decline. There are also repercussions for other species such as endangered Southern Resident killer whales that depend on them for food.