humpbacked salmon

Webster's Dictionary (1913)

A small salmon (Oncorhynchus gorbuscha) which ascends the rivers of the Pacific coast from California to Alaska, and also on the Asiatic side. In the breeding season the male has a large dorsal hump and distorted jaws.

Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54 · with additions: 1913 supplement