Fry swim to the surface of the water, fill up their swim bladders with oxygen, and begin to feed. Depending on the species, fry can spend up to a year or more in their natal stream. Upon emerging from the gravel, both pink and chum are already silvery smolts, and head directly to sea. Sockeye fry tend to migrate to a lake, spending 1-2 years before migrating to sea. Chinook fry usually spend less than 5 months in freshwater, while coho fry may spend over a year. The survival of fry is dependent upon high-quality stream habitat. Boulders, logs, shade, and access to side channels is important in allowing fry to hide from predators and prevents them from getting flushed downstream during flood river-flows.