Fish longganisa, or fish chorizo, is a Filipinosausage made with fish instead of pork or beef. It is typically made from tuna, tilapia, or milkfish. It is prepared identically to other Filipino longganisa and is marketed as a healthier alternative. It may use regular pork casings, vegetable-based casings, or be prepared "skinless" (without the casing).[1][2][3]