Crush the garlic clove, sprinkle with a pinch of salt, and mash into a coarse paste using flat side of a large knife. Mix the garlic paste with the cilantro, oil, habanero, mango, lime juice and scallions in a medium bowl. Season with salt and as much of the remaining habanero as desired for spiciness. Set aside.
Pat the fish dry and sprinkle with salt and pepper. Lightly oil the grill grates. Place the salmon, skin side-up, on the grill and cook until well-marked, 3 to 4 minutes. Turn the salmon and continue to cook until the fish is just cooked through, about 3 to 4 minutes more.
Serve the salmon with the salsa and a lime wedge.
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