>amphidromous: Moving from fresh water to the sea, or vice versa, for nonreproductive purposes such as feeding.

Yet they also migrate from salt to frsh to spawn. So are they amphidromous, fluvial, adfluvial, and resident- *and* anadromous? Even more confusing is they seem to have no mind for pattern. They may be resident for years then live amphidromous and vice versa.

I'm interested in their homing back to spawn areas. They wander all over, do they spawn random as well (or more randomly than other salmonids?)