Soak wooden skewers in water for 15 minutes to prevent burning.
In a bowl, whisk together olive oil, lemon juice, lime juice, garlic, salt, lemon pepper, and cayenne.
Add shrimp and scallops to the marinade, coat well, and let sit for 10 minutes.
Thread shrimp and scallops onto skewers, alternating them evenly.
Preheat the grill to medium-high heat and lightly oil the grates.
Grill kabobs for 2-3 minutes per side until shrimp turn pink and scallops have a golden sear.
Remove from grill and let rest for a minute before serving.
Serve hot with your favorite dipping sauce or a side of fresh salad.