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During their spawning phase, the jaws and teeth of the coho become hooked.They develop bright red sides, bluish green heads and backs, dark bellies and dark spots on their backs after they go in to fresh water.
During their ocean phase, Coho have silver sides and dark blue backs with spots.
Fish: Red or Sockeye Salmon Silver or Coho Salmon Dog or Chum salmon Pink or Humpback Salmon King or Chinook Salmon Pacific Halibut Cod Marine Invertebrates: Bidarki or Black Katy Chiton Sea Urchin Blue Mussel Marine Mammals: Sea Otter Killer Whale (Orca) Sea Lion Gray Whale Harbor Seal Birds: Black Brant Emperor Goose Canadian Goose Common Teal Mallard Harlequin or Rock Duck Red Breasted Merganser or Fish Duck Willow Ptarmigan Magpie Bald Eagle Land Mammals: Brown Bear Caribou Red Fox Weasel Land Otter The red salmon or sockeye (Oncorhynchus nerka), is the most highly prized salmon in the Unimak area and has the highest commercial value.
It is an anadromous species of salmon found in the Northern Pacific Ocean and rivers discharging into it.
Sexually maturing coho develop a light pink or rose shading along the belly and the males may show a slight arching of the back.
Mature adults have a pronounced red skin color with darker backs and average 28 inches (71 cm) and 7 to 11 pounds (3.2 to 5.0 kg) occasionally reaching 36 pounds (16 kg).
They have an ocean coloration of silvery blue green.