Tropical Tuna Ceviche Recipe by Tasty

Name: Tropical Tuna Ceviche Recipe by Tasty
Ingredients: 2 fresh tuna steaks, diced; 1 navel orange, halved, divided; 1 grapefruit, halved, divided; 2 lemons, halved, divided; 6 limes, halved, divided; 1 tablespoon white vinegar; 2 tablespoons olive oil; kosher salt, to taste; 2 cucumbers, diced; ¼ red onion, diced; ½ red bell pepper, seeded and diced; ½ orange bell pepper, seeded and diced; 1 jalapeño, seeded and diced; 1 ½ cups diced mango; 1 avocado, peeled, pitted, and diced; ¼ cup fresh cilantro, chopped; tostadas or tortilla chip, for serving