Mix the seafood and lime juice in a large non-metal bowl
Let it settle for 10 minutes
Cover and refrigerate for 30 minutes after adding chopped tomatoes and onion
Mix tomato paste, chili powder, cumin, cayenne pepper, and salt in a small bowl
Whisk in Worcestershire and hot pepper sauce
Refrigerate for 30 minutes
After 30 minutes, add half the tomato paste with the fish
Cover remaining tomato paste-fish
Refrigerate them for 30 minutes
After another half hour, add the leftover tomato paste mixture, stir gently, cover, and refrigerate
Stir the ceviche gently with chopped avocado and cilantro before serving