You were working a Salmon Run shift, for whatever reason, when Mr. Grizz suddenly said:

Mr. Grizz: "You've got a Boss Salmonid incoming. DO YOUR JOB!"

Geez, rude much. Anyways, as you looked around for the Boss Salmonid, you saw a Scrapper and Steelhead along the shore. Your teammates were attacking the Steelhead and the Salmonids coming up from the shore.