Figure 15.1 - 15.4. 15.1. Oncorhynchus nerka (Sockeye Salmon); scale bar = 1.0 mm. 15.2. Oncorhynchus nerka (Sockeye Salmon); scale bar = 1.0 mm. 15.3. Oncorhynchus nerka (Sockeye Salmon); sketch of living specimen, spawning male; length = 84 cm. 15.4. Oncorhynchus nerka (Sockeye Salmon); sketch of living specimen, male or female; length = 84 cm. (To see enlargement, click on image.)