Previously we have sold both of these items as Rainbow Trout and both are indeed the same species (Oncorhynchus mykiss). However, customers have different expectations on what rainbow trout should be so we are now carrying both varieties and letting you decide. The rainbow trout with white flesh is what is more traditionally considered "normal" and is from one of the most reputable fisheries in the US - Clear Springs. They are fed grain pellets and raised in water diverted from mountain streams in Idaho or Chile. The other rainbow trout fillets - Ruby Reds - are also farm raised but in Canada. They are fed freshwater shrimp which is their natural food and since the shrimp are red, the flesh has a pinkish color. Ruby Reds are as close as you can get to Rainbow Trout you would catch on freshwater streams. These could also be called Steelhead Trout, but Steelhead trout are anadromous and live most of their life in the ocean in salt water. These Ruby Red Rainbow Trout do not, however they may also go by the name Steelhead, but should not be confused with farm raised salmon.