Excerpted from the WDFW Chum Salmon Life Cycle Migration to Sea - The newly emerged fry immediately begin downstream migration to marine waters. A very small number of chum fry may reside in freshwater until the end of summer. When the fry first enter saltwater they assemble in small schools and reside close to shore to avoid predators. As the young fish grow, they gradually move to deeper waters and generally migrate towards open ocean waters. Mortalities during this early marine life period are primarily the result of predation by birds and other fish species. By mid- to-late summer the juvenile chum have reached ocean waters. At this time they are approximately 4 to 6 inches long. Some chum salmon juveniles will remain in nearshore marine waters until late in their second year before migrating to the open ocean. Hence: Bob Triggs' infamous "Chum Baby" Leland.