Aha!! From the same site I posted above:

Unlike the various species of Pacific salmon, the Atlantic salmon does not die after its first spawning but returns year after year to its breeding place. The newly hatched young, which is known as a parr or a brandling because of the dark transverse m arkings on its sides, remains in fresh water for about two years. At this time, the young, which is known as a smolt and which has become silvery in color, descends to the sea. Upon the first return of the Atlantic salmon to its spawning ground, the fish is known as a grilse. After spawning, it is known as a kelt. Adult males traveling toward the spawning grounds are known as dog salmon. \

Now ain't that somethin'! It's the Atlantic salmon that doesn't die spawning, but specifically the Pacific salmon. I'm assuming here that there are many species of each, but will read a bit more.

Very, very interesting, don't you agree?