Heat oil in a large soup pot over medium heat. Add celery, carrots, onion, green pepper, and garlic; saute about 8 minutes.
Stir in tomato paste, and cook 1 minute. Add clam juice, potatoes, canned tomatoes with juice, Worcestershire sauce, jalapeno pepper, bay leaf, and ground black pepper. Simmer until potatoes are tender, stirring about every 30 minutes.
Add fish. Simmer until snapper is easily flaked with fork, about 10 minutes.
