doggirl-The shrimp should be firm when you touch it, and the finished product will look white, not translucent. Most recipes call for cooking shrimp, as most people just have a hard time eating something that hasn't been "cooked" with heat. Most chefs that develop these recipes are aware of this. Although this method is not a true ceviche, it is certainly acceptable and tasty. Now, cooking scallops for a scallop ceviche would be a travesty, IMO! My fave is watermelon, shrimp, lime, mango, rice vinegar, cilantro, red onion, ginger, Midori and jalapeno.