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.
The fideo is a type of noodle, popular in Mexican and Latin American cuisine, often referred to by speakers of English as vermicelli.. It is commonly used in chicken soup and in sopa seca, a type of side-dish.