In a large saucepan, heat olive oil over medium-high heat. Add onion; saute, stirring frequently, until it is lightly golden, 2 to 3 minutes.
Add olives, garlic, jalapeno, lime juice, oregano, and orange zest; cook 1 minute. Add wine; continue cooking until it is reduced by half, 1 1/2 to 2 minutes.
Add tomato, clam juice, the water, and chicken broth; bring to a boil. Reduce heat to medium, and add seafood. Cover, and simmer until snapper and scallops are opaque and clams have opened, about 12 minutes. (Discard any clams that do not open.) Serve hot, ladled into soup bowls. Garnish with parsley.