In a medium mixing bowl, combine the diced mango, diced avocado, red onion, red bell pepper, and chopped fresh cilantro.

Drizzle the freshly squeezed lime juice over the salsa ingredients. Toss gently to combine and set aside.

Pat the salmon fillets completely dry using paper towels. Rub the blackening seasoning evenly over the flesh of the salmon fillets.

Heat the olive oil in a large skillet over medium-high heat until it shimmers.

Place the salmon fillets into the hot skillet. Cook for 3 to 4 minutes per side, depending on thickness, until a dark crust forms and the fish flakes easily with a fork.

Remove the salmon from the skillet and transfer to serving plates. Top generously with the prepared mango avocado salsa and serve immediately.