Ceviche de CamaroneTraditionally, ceviche is "cooked" by the chemical action of the lime juice. (See Marinated Fish Cocktail.) Instead, for this ceviche the shrimp is briefly cooked in boiling water before marinating. People who are put off by the idea of eating raw fish like this method very much. Marinate the ceviche for 3 to 4 hours before serving.