It's a fried pancake of salted codfish — a fish that was never native to the Caribbean but became a pantry staple through centuries of the Atlantic trade.
A seasoned batter mixed with shredded salted codfish is ladled into hot oil, spreading into a thin, lacy, irregularly shaped fritter fried until crisp. It's sold hot at beachside kioskos, often right alongside alcapurrias.
Pinchos