Fish oil is the fat or oil that's extracted from fish tissue. It usually comes from oily fish such as herring, tuna, anchovies and mackerel. Yet sometimes it's produced from the livers of other fish, as is the case with cod liver oil.
A piquillo pepper is a type of small red chili pepper with a shape similar to a triangle that is grown in Spain. It has a flavor that is slightly sweet and spicy, but it is not a truly hot pepper.
Nothing out of the ordinary. After reading about them, I wanted to try piquillo peppers roasted in the traditional Spanish way. Picuezo is a Spanish brand, but it turns out these peppers are from Peru, according to the label. Maybe that's why they taste just like the roasted red peppers I buy at the supermarket.