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Lorsque l'alevin émerge, il commence immédiatement son avalaison vers les eaux marines. Pendant son séjour en eau douce, le saumon kéta se nourrit surtout d'insectes aquatiques. L'alevin migrateur forme des bancs dans l'estuaire , demeure près du rivage quelques mois pour éviter les prédateurs, puis se déplace vers les eaux profondes de la haute mer entre le milieu et la fin de l'été.
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When the fry emerge, they immediately begin their downstream migration to marine waters. During the freshwater stage of their life cycle, chum feed on aquatic insects. Migrating fry form schools in the estuary, remain close to the shore for a few months to avoid predators, and then move to deeper open ocean waters by mid to late summer. At this time they are approximately 10 — 16 cm long. Some juvenile chum will remain in nearshore marine waters until late in their second year before migrating to the open ocean. As early as the third year of their life, chum will begin their migration back to their spawning ground.
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