Definition of "humpie"

There was a lot of snagging at first, of humpies too tired to resist, of deadfall trailing limbs in the water, but after a while Gregor caught and by a miracle landed a two-pound rainbow and everyone began fishing in earnest.

1999, Dana Stabenow, Hunter's Moon, page 44

Humpies travel in schools on or near the surface, so the dorsal fin can be easily spotted.

2011, Warren Miller, Lurching from One Near Disaster to the Next

The once-unthinkable to Hank became his concentrated project for the next several days: to hone his deckwise wife to the mysteries of spotting and capturing humpie salmon from the viewpoint of the wheelhouse.

2013, William B. McCloskey, Raiders: A Novel