Sei Whale Identification Tips

Blow:  Bushy blow, rising about 10-13 ft. above the surface of the water
Dorsal Fin:  Curved or falcate fin about 2/3 down the animals body.  Can be seen at the same time as the blow
Fluke:  When diving, the animal does not arch its back nor does it raise its flukes
Length:  Up to 40-60 ft (12-18 m)
Up to 100,000 lbs (50 tons; 45,000 kg)
Color:  Large, sleek body, that is dark gray on its back and often white or cream-colored on the underside (similar to Bryde's whales)
Throat pleats:  30-65 relatively short ventral pleats
Diet:  Feeds on small schooling fish, squid, and smaller zooplankton (copepods & krill)
Behaviors:  Usually observed singly or in small groups of 2-5 animals

To report a dead, injured or stranded marine mammal, please call: 1-866-767-6114 
For law enforcement, harassments,  and other violations, please call:  1-800-853-1964

or hail the U.S. Coast Guard on VHF Ch. 16
For entangled marine mammals, please call: 1-855-542-3935

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