Disappearing act?

Back in December, I was trying to photograph this fish in the low intertidal zone:

 

 

I turned my head for a second and when I looked back I couldn't find the fish again.  I started scanning the pool, and then I noticed a silvery green-blue color out of the corner of my eye:

 

 

 

Whoops!  The first fish had been caught by a second fish!

 

I could use some help with the identifications.  Any ideas?  I'm wondering if the first fish is a Topsmelt (Atherinops affinis).  The second fish appears to be a sculpin, but I'm not sure which species.  If you have any thoughts about either one, I'd be interested.