Orca
Black-and-white pattern, tall dorsal fin, and a family-specific acoustic world make the orca much more than a generic “killer whale.”
Artwork inspired by Morris Graves
Orcas are the largest dolphins, but one species contains ecologically and culturally distinct populations. Southern Residents follow salmon and live in stable maternal families; Bigg’s killer whales hunt marine mammals and travel in smaller, quieter groups. Shape, behavior, season, and association all matter before assigning a population.
Washington’s Southern Residents face intertwined pressures from scarce Chinook salmon, disturbance, contaminants, and underwater noise. Observe from shore where possible, follow vessel distance rules, and never use a single dorsal-fin glimpse to declare an individual. Serious identification compares saddle patches, fin shape, and companions against reviewed catalogs.
- Family
- Oceanic dolphin
- Local contrast
- Southern Resident and Bigg’s ecotypes
- Washington link
- Official state marine mammal
Quick guide
- Begin with behavior
- Fish-eating and mammal-eating orcas often move and socialize differently.
- Study the saddle
- The pale patch behind the dorsal fin helps individual identification.
Recognize and observe
- Begin with behavior
- Fish-eating and mammal-eating orcas often move and socialize differently.
- Study the saddle
- The pale patch behind the dorsal fin helps individual identification.
- Choose shore
- Headlands and ferry routes can offer views without pursuit.
- Reduce disturbance
- Distance and low noise preserve feeding and communication space.
Good to know
“Resident” does not mean permanently inside one bay. Southern Residents range widely, and Bigg’s killer whales may also appear throughout the Salish Sea.
Notice these
- Oceanic dolphin
- Southern Resident and Bigg’s ecotypes
- Official state marine mammal