What am I looking at?

This was in the Willamette today, near downtown. Looks like a giant bait ball, the kind you see in the ocean or B10. There were several of these and one bigger than this.

Did not get any bites but I saw two salmon in the mouths of giant sea lions. 

Smelt?

Smelt?

That'd be my guess.

With you being in water only 32ft deep, those images look to be larger fish instead of smaller baitfish. There are no bait clouds there. Those look like fish.

I think they are bait sized fish. I've tried a sabiki rig on images like that and I get herring or anchovies.