How this Adult Chinook Compares with Other Adults
Note: males and females are practically indistinguishable at this stage.
Using the galleries above, study the differences between the five Pacific Northwest salmon in their mature ocean state. When you are ready, click this image to take our Mature Ocean Salmon Identification Quiz. > > >
Note to teachers: the differences between mature ocean-phase salmon can be subtle — and challenging — even for adults. We therefore recommend targeting this quiz toward older students.