Combine the pineapple, mango, cucumber, bell pepper, bell pepper, cilantro, lime juice and jalapeno. Season to taste with salt and pepper, and set aside.
Heat a large, nonstick fry pan over medium-high heat. Coat the pan with cooking spray. Season the scallops with salt and pepper. Add half of the scallops to the pan; sear until golden brown on both sides, about 2 minutes per side. Transfer the scallops to a warmed plate; set aside. Repeat with the remaining scallops.
Divide the scallops among four warmed plates. Spoon the salsa over the scallops, and serve immediately.
