Blue Whale Identification Tips

Blow: can be seen 20ft. above the surface of the water, straight up
Dorsal Fin:  curved and located back on the body
Length: up to 88-108 feet (27-33 m), depending on location (blue whales are largest in the Antarctic and smaller off the U.S. West Coast)
Weight: up to 330,000 pounds (150,000 kg)
Appearance: long body with mottled gray color pattern that appears light blue when seen through the water
Lifespan: unknown, but sexually mature around 5-15 years
Diet: krill, almost exclusively (up to 6 tons per day)
Behavior: reproductive activity, including births and mating, mostly takes place during the winter


To report a dead, injured or stranded marine mammal, or to report harassment and other violations: 1-800-853-1964. Entangled marine mammals: 1-877-SOS-WHALe or 1-877-767-9425 or hail the U.S. Coast Guard on VHF Channel 16. To report derelict gear 1-855-542-3935.


Photograph the animal if possible and contact Cascadia Research Collective:360-943-7325