In a bowl, incorporate the cream cheese, chopped shrimp, crab, shredded cheese, chives, garlic powder, lemon zest, salt, and black pepper. Stir gently so the crab stays tender while the filling becomes creamy and cohesive.

Flatten each biscuit into an even circle on a clean surface. Spoon the seafood filling into the center of each round, leaving enough edge to seal.

Fold the dough over the filling and pinch the edges firmly to close. Place each biscuit seam-side down on a parchment-lined baking sheet so the filling stays tucked inside.

Brush the tops with beaten egg for a polished golden crust. Bake at 375°F for 15 to 18 minutes, until the biscuits are puffed, browned, and cooked through.

Let the melts stand for a few minutes before serving so the filling settles slightly. Serve warm with marinara, spicy aioli, or herbed ranch if desired.