There are fried fish shops distributed throughout Seville. Two of the most famous and closest to the historic center and the monumental area are Freiduría Puerta de la Carne (Santa María la Blanca, 33), in Santa Cruz área, and Freiduría El Arenal (Arfe 8), close to the Maestranza bullring. In Triana, Freiduría Reina Victoria (Rodrigo de Triana, 51).
The ingredients with which fish fries are made in addition to fresh fish, prawns or other crustaceans, are flour (usually chickpea) and olive oil at high temperature. Usually, 85% or 90% of the products and dishes cooked in these establishments are seafood. Meat products are few and sometimes infrequent but those served, as you probably suppose, are not Halal. However, it is important to keep in mind that in the preparation of fried foods, fish and meat never come together (it is not possible to do it because, simply, it mixes and contaminates the flavor). Normally these establishments serve alcohol (although some are dedicated exclusively to the sale of fried foods, they are very minority). If you prefer not to eat in them, you can always take the fish cones or buy by weight. Many locals even do it that way.