Head to head
Chum Salmon vs Pink Salmon
A chum salmon and a pink salmon are both Pacific salmon species sharing the same North Pacific waters, but each has taken a strikingly different approach to size, migration, and life cycle timing.
| Chum Salmon | Pink Salmon | |
|---|---|---|
| Scientific name | Oncorhynchus keta | Oncorhynchus gorbuscha |
| Relative size | Larger | Smallest Pacific salmon species |
| Overall abundance | Abundant | Most abundant Pacific salmon |
| Life cycle length | Variable | Rigid two-year cycle |
| Spawning-season transformation | Dramatic canine-like teeth | Pronounced back hump in males |
| Nickname | Dog salmon | Humpback salmon |
| Native range | North Pacific, North America and Asia | North Pacific, North America and Asia |
| Conservation status | Least Concern | Least Concern |
Chum Salmon vs Pink Salmon: common questions
Which salmon is more common, chum or pink?
The pink salmon is generally considered the most abundant Pacific salmon species by overall population numbers, despite being the smallest individually, while the chum salmon remains widespread and abundant in its own right but does not reach the same sheer numbers as the pink salmon across the North Pacific.
Why does the pink salmon only return every other year?
A pink salmon follows an extremely rigid two-year life cycle, meaning populations spawning in a given river typically return only in either even-numbered or odd-numbered years, a fixed timing not shared by the chum salmon, whose life cycle length varies more and does not divide so cleanly by strict two-year classes.
What physical changes happen to each salmon before spawning?
A male chum salmon develops dramatic, enlarged canine-like teeth during the spawning season, earning it the nickname dog salmon, while a male pink salmon instead develops a pronounced hump on its back, a different but equally dramatic transformation that gives the pink salmon its own nickname, humpback salmon.