Herring, candlefish and small squid imitations, and of course Leland's Beach Popper all kick butt.
I like to tie herring flies on a tube to get the hook to the rear of the fly. Use mylar tubing to cover the nylon tube and dress over/under to get the profile. Search for page's bigeye baitfish, this is one of my favorite general construction methods but on a tube. I have a juvie pattern variation in the archives.
Candlefish on a 911s long shank hook or tube as well. Clouser style works great as an imitation as well.
Small squid are a natural on a tube to get the hook back to the legs while a long mantle is on the tube.
Ryan (Nfk16) showed me a great coho pattern a couple yrs back at Sekiu - tie mylar tubing around the outside of a narrow deceiver and unravel it so it dances as the fly is stripped. Man it works!
Go look in the archive there are a few flies in there. Set the options to look back all the way to the beginning.