How to Make It
Heat the oil in a large nonreactive skillet until shimmering. Season the bass with salt and pepper and add to the skillet skin side up. Cook over high heat until nicely browned but barely opaque throughout, about 1 minute per side. Transfer to a plate.
Add the onion to the skillet and cook over moderately high heat, stirring, until browned, about 3 minutes. Raise the heat to high. Add the garlic, mango, tomato, habanero and a pinch each of salt and pepper and cook until fragrant, about 2 minutes. Add the wine and cook until reduced by half, about 2 minutes. Add the fish stock and bring to a boil. Reduce the heat to the moderately low and simmer for 2 minutes.
Lightly squeeze the lime into the broth and add the wedges along with the fish. Cover and cook until the fish is opaque throughout, 1 to 3 minutes. Season with salt and pepper. Transfer the fish and vegetables to 4 soup plates; spoon the broth over the top. Sprinkle with the cilantro and serve.