Salmon no, no oily fish [except perhaps some target feeding with fish that have HLLE]. Shrimp, squid, octopus, scallops, clam, conch, nori or seaweed selects, etc. Blend it in food processor or blender with a bit of zoecon and even a bit of fresh garlic. Then partition the mixture out in to portions. You can freeze about a month's supply but make sure that your mixture is really sealed well for freezer.
If you go to the seafood counter of the grocery store, ask them to fill out a 1/2lb container with whatever you choose out the selection there. Also, there is a packaged seafood mix sold at the grocery store that has a bunch of great stuff in it. People usually buy this to make seafood salads or oriental seafood dishes, etc.
Your fish will love you for it! And reward you with good color and better health.