Researchers say their absence is a stark reminder that the orcas are slowly starving to death because there is not enough Chinook salmon to sustain them.
The Center for Whale Research is dedicated to the study and conservation of the Southern Resident Killer Whale population in the pacific northwest.
Observations From Members 
Chinook salmon
/https://www.thestar.com/content/dam/thestar/vancouver/2019/06/23/the-salish-seas-orcas-are-late-for-their-annual-summer-visit-scientists-warn-its-the-latest-sign-something-is-wrong/_1_j50_whale.jpg){kind=link}