In a small bowl, coarsely mash 1 cup blueberries. Stir in the onion, cilantro, jalapeno, orange juice, vinegar, 1 teaspoon oil, 1/8 teaspoon salt, pepper and remaining blueberries. Cover and chill until serving.
Meanwhile, drizzle fillets with remaining oil; sprinkle with remaining salt. Grill halibut, covered, over medium heat for 4-5 minutes on each side or until fish flakes easily with a fork. Serve with salsa.
Wear disposable gloves when cutting hot peppers; the oils can burn skin. Avoid touching your face.