What is this flatfish?

Well, I know petrale sole have small teeth (and 2 rows of em on top). The fish in question appears to have pretty large teeth. Plus, most petrales are much deeper than 4-8ft. Like 100ft+ right?
I am going to agree w/sand sole.

I'm pretty sure it was a sand sole (not a protected groundfish).  Quick question for you Erik... was the eyed side of the fish rough or smooth?

Brian - I'm pretty sure it was rough.  That is, for the most part the fish was very delicate and smooth - nothing like a rockfish, and I was trying not to touch it too much of course.  At one point I did notice that it had a roughness when I moved my finger along it's flank from the tail end toward the head.  So I'd say it was rough, one way. 

So...  Sand Sole sounds satisfactory.   

I think you are right BlackAb!  I just did some research on the sand sole and it sure looks the same!  The tail is also shaped like the sand sole more than the curved tail of the petrol sole.

Sand Sole

http://calphotos.berkeley.edu/browse_imgs/fish_com_27.html

Sand Sole:
Right-eyed. Eyed side light green or gray to brown with fine, dark brown to black speckles. Skin on eyed side has the feel of fine sandpaper. Dorsal and anal fins often have dull yellow on edges. Blind side white. Body shape elongate to oval. Caudal fin rounded. Lateral line has slight curve over pectoral fin; accessory dorsal branch short to moderate. Mouth large with large teeth. Maxillary extends below middle of lower eye. Eyes small with flat, wide space between them. Anal spine strong. First few dorsal fin rays elongate and mostly free of membrane.

From near shore to about 100 fm. A shallow water species usually found shallower than 40 fm. Prefers sandy bottom.

Fine food fish. Common and often caught by sport fishermen from shore. A minor part of the commercial trawl catch.

http://www.dfw.state.or.us/MRP/finfish/sp/sandsole.asp

I withdraw my first opinion 

Matt