I don't feed any of the cooked seafoods to my fish. Most don't like the boil seasonings. I've been buying the 2lb bags of frozen raw shrimp for decades. The fish love them and I've never had any problems with the raw shrimp. BTW, I just looked at a bag and it doesn't say bleach anywhere. Considering the shrimp is intended for human consumption, and a significant portion of the population is allergic to bleach, the label would have to show if the shrimp was indeed processed with bleach additives above the levels found in municipal tap water.