Heat grill to high and lightly oil grates.
In a medium bowl, combine cherries, onion, cilantro, jalapeno, and lime juice. Season with salt and pepper, and toss to combine. Set salsa aside.
In a small bowl, stir together coriander, 2 teaspoons salt, and 1/2 teaspoon pepper. Rub tilapia all over with oil then sprinkle with spice mixture.
Grill tilapia until opaque around the edges and underside loosens easily from grill, 2 to 3 minutes. Flip fish and continue to cook until opaque throughout, 2 to 3 minutes.
Serve tilapia topped with cherry salsa.