mexican-style seafood cocktail w/ shrimp or crab

Ingredients

• 1 pound shrimp, deveined and cooked (can substitute or add crab)
• 2-3 roma tomatoes, seeded and diced small
• 1 small red onion, finely chopped
• 1 clove garlic, minced
• 1-2 jalapenos, seeded and finely diced
• 1/4 bunch cilantro (leaves only), chopped
• 1-2 limes, juiced
• 1/4 can seafood cocktail sauce with horseradish
• 4 avocados, diced
• salt & pepper to taste