Landlocked vs. Atlantic Salmon: What's the Difference?

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In this week’s “Fine Lines” column, Phil Monahan responds to a reader’s question about the difference between landlocked and atlantic salmon, noting that although there are some genetic differences, the two fish are considered the same species.
“In the U.S., landlocks were originally found in just four Maine lake systems–Sebago, Green, Sebec, and Grand. Although many people believe that landlocks are ‘glaciomarine relicts,’ trapped by rising land and dropping sea levels some 10,000 years ago, more recent evidence suggests that certain Atlantic salmon simply stopped going to the ocean.”