Juice the Lemon (1) and Lime (6) until you have about 1 cup of fresh juice.
Dice the Fresh Yellowtail Snapper Fillet (0.25 pound) into a half-inch dice.
Place the diced snapper in a small glass bowl and pour in the fresh juice to cover the fish. Swish the fish around in the juice so that every piece floats in the liquid. Cover with saran wrap and refrigerate 3 to 4 hours until the fish is "cooked" and opaque.
Prepare the finely diced Red Onion (1/2 cup) and dice the Red Bell Pepper (1). Add them to a large mixing bowl.
Mince the Jalapeño Pepper (1) and Cucumber (1/2 cup) into a quarter-inch dice. Prepare the chopped Fresh Cilantro (1/3 cup). Add to the same bowl.
Give the Pineapple (1/2 cup) a quarter-inch dice, and add it to the bowl.
Set a fine mesh strainer over a small bowl and pour the fish into the strainer. Transfer the fish to the vegetable mixture. Reserve the juice.
Spoon out 3 to 4 tablespoons of the citrus juices and add to the fish mixture. Dice the Avocado (1) just before serving and add to the fish mixture. Gently toss the mixture together to combine. Season with Salt and Pepper (to taste) and Hot Sauce (to taste).
Serve with Tortilla Chips (to taste) and a cold cerveza.