Atlantic salmon and Salmon

Atlantic salmon noun - Found in northern coastal Atlantic waters or tributaries; adults do not die after spawning.

Salmon and Atlantic salmon are semantically related. In some cases you can use "Salmon" instead a noun phrase "Atlantic salmon".

Salmon noun - Any of various large food and game fishes of northern waters; usually migrate from salt to fresh water to spawn.

Atlantic salmon and salmon are semantically related. You can use "Atlantic salmon" instead a noun "Salmon".