Well, not exactly. There are also coho that are smolting now; fall smolts and there are the "estuary smolts" that enter the estuary as fry/fingerlings and then head to the ocean later (fall? Winter? Spring?) But they are all out the aggressively feeding and are not of "desirable" size.

Coho also molt as age-2, and these may enter the salt at 350-400mm. Don't know if the migrate to sea or stay inshore and return the same year as they smolted.

There are actually, in a fully functioning ecosystem, coho that return to spawn as adults at age 2, 3, and 4. The management paradigm that emphasizes only spring smolts is what leads to almost independent brood year lines maturing as 3s which significantly reduces genetic interchange between broodyears