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Oceanic trout species (Salmo salar), a highly prized game fish. It averages about 12 lbs (5.5 kg) and is marked with round or cross-shaped spots. Found on both sides of the Atlantic Ocean, it enters streams in the fall to spawn. The young enter the sea in about two years and mature in about four. Adults may return to the sea and, after a year or two, spawn again. The ouananiche of rivers and the sebago, or lake, salmon are landlocked subspecies that are also prized for sport. The Atlantic salmon has been successfully introduced into the U.S. Great Lakes.
This entry comes from Encyclopædia Britannica Concise. For the full entry on Atlantic salmon, visit Britannica.com.