Ceviche, which hails from Peru, features raw fish marinated in citrus juice for 20-30 minutes, while aguachile consists of seafood mixed with lime juice and served immediately, resulting in a different texture.
A good plate of Sinaloa-style aguachile starts with liquid hot peppers, lots of lime, and freshly butterflied, raw shrimp. The flavor and heat build like a strong corrido: dramatic and full of contrast, tension and release.