Snohomish County and the Tulalip Tribes survey fish four times a month around the Snohomish River estuary by setting a net and counting the fish it catches. They measure size, record species, and look to see if Chinook salmon are recovering in light of habitat restoration projects. Chinook salmon are the preferred food of the Southern Resident killer whales, the 76 orcas on the brink of extinction. Since the fish aren't doing well, the whales are starving. Scientists have focused much of their effort on restoring salmon habitat which has been lost to development, agriculture and other issues, but they say the projects are way behind and need to speed up if we want the orcas and their favorite prey to survive.