The title refers to migrating salmon.
The character of Cherry Malotte was a favorite of author Rex Beach. She is in at least two of his novels, the other being "The Spoilers" where the action is also based in Alaska.
This film was not successful at the box office for RKO, resulting in a loss of $100,000 ( nearly $1.8M in 2022) according to studio records.
This film shows the detailed (and impressive for 1930) process of harvesting, preparing, canning, and packaging massive quantities of salmon.