Since we're talking fish food, lets drill a little deeper.
Omega One is considered a premium fish food because they use fresh whole fish rather than nondescript fish meal...which can be made from whole fish, or the processing waste by products (heads, bones, scales).
I read an article months ago that exposed fish food ingredients. What's listed is by weight, so when whole fish is used, it is the weight and may even include the ice it's packed in. When processed, this fresh fish is likely much lower in the real ingredient list. On the other hand, fish foods made from WHOLE fish meal, may in fact yield a better product for fish. However, as a trade off, fresh fish would require less grain starch as binder than would be required for dry fish meal.
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But note the WHOLE fish meal. When, for example, if a label just says "Salmon meal" as the first ingredient, this could just be the head, bones, and skin of a salmon and not whole salmon meal. BUYER BEWARE.
Also note that whole fish meal used in fish foods may come from all sorts of fish and fish that are not suitable for human consumption.
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It's my understanding based on statements I got from manufacturers for an article I wrote that New Life Spectrum, Tetramin, Ocean Nutrition, and Cobalt are all using whole fish meal.