What counts as a portion of oily fish?
An oily fish is one containing omega 3 fatty acids. This includes fresh, canned or frozen salmon, sardines, pilchards, mackerel or herring, and fresh or frozen tuna. Vacuum packed oily fish is also acceptable. Tinned tuna does not count as an oily fish, although fresh or frozen tuna do. This is because the canning process removes a significant amount of the omega 3 oils. The intention of the standards is that pupils should eat a portion of oily fish, so whilst a sandwich filling or a portion served as part of a salad would meet this, the amount of oily fish as a pizza topping is unlikely to be sufficient.
