While I agree that salmon is listed first, that does not necessarily equate to salmon being higher in content than herring or shrimp. They could quite easily all be the exact same weight. Speaking of which, is that dry weight, or wet weight? It makes a BIG difference when one starts comparing ingredients & the order to which they are listed on a label. Listing raw ingredients by wet weight, such as "fresh chicken" is a common practice used by certain dog & cat food manufacturers. It looks very impressive as the main ingredient, until one realizes that whole chicken is made up from 60-70% water. Remove the water, and now where does it end up on the label? Hmmmmm.
When formulating a feed, it doesn't matter how long the list of fish ingredients are on a label, the total is still the total, whether one uses 500lb's of herring, 500 lb's of cod, or 500 lb's of 10 different species of fish. At the end of the day it's still 500 lbs of fish protein.
My biggest problem with Omega has always been how they market their products, such as
"Using fresh, cold water marine proteins and kelp, as ingredients, instead of fishmeal and a whole lot of starch (like everyone else) puts Omega One light years ahead of any other fish food on the market. It truly is the Best Fish Food in the World
When in reality their fresh cold water marine proteins, are nothing more than glorified fish processing waste. (heads, skins, and bones)
http://forum.simplydiscus.com/showthread.php?49439
The person that responded to that email (Denny) was none other than Dennis Crews, the owner of Omega Sea Ltd.
No big news to me, I've known about the processing plant waste for many years, and shortly after I reported it in a discussion that I know Denny did in fact read (on cichlid-forum.com), all traces of those articles were removed from the internet. Hmmmmm.
When the EPA clamped down on Alaskan fish processing plants (that were dumping their waste in the ocean) along came Dennis Crews (owner of Omega, and a former national sales rep for Tetra) and these fish processors were more than happy to let him take their processing plant waste (heads, skins, and bones) off their hands. The Alaskan Govt. were more than happy to provide a large grant for Omega as they were helping resolve a serious problem with processing plant waste, and pollution. A win-win for everyone.
But of course this wasn't exactly how Omega was marketing their fish waste, it was more along the lines of "Fresh fish from Alaska" with pretty pictures of boats out in the Alaskan waters. Most people don't realize that Omega Sea Ltd. is now based in Ohio, with only their frozen food plant left operating in Alaska. I wonder how well "Fresh fish from Lake Erie" would play to consumers? 
This is in no way stating that Omega makes a poor product, I simply have a very low tolerance level for companies that attempt to feed me BS, and because of that Omega lost me as a customer many years ago. Dennis Crews is a marketing genius, I'll give him that, but he can't hold a candle next to someone like Pablo Tepoot who has been keeping, breeding, and raising fish on a commercial basis by the millions for the past 40 years.
Never going to happen, not unless someone knows a non-biased 3rd party accredited institution that is willing to perform such an analysis, and make those results public. Then again, I don't need to see those results to know which company would be, as Denny put it, light years ahead of any other fish food on the market. 
When you google fishmeal it is stated that fishmeal is made from trimmings,fins,bones, skin, and fish that are to small or not fit for human consumption. So whats the difference between what most fish foods contain and Omega One? The only difference is that atleast in Omega One you know what type of fish the trimmings come from. Im not stating that one food is better than the other just that fishmeal also comes from scrap pieces of fish. Fishmeal is then processed by boiling, and then pressing to remove the oils, then dried into a powder. Unless wikipedia is wrong I don't see much difference.