Preheat oven to 350 degrees. Spread coconut on a small baking sheet. Bake, stirring occasionally, until just beginning to brown, about 10 minutes. Remove from oven, and let cool.
Ice cupcakes with chocolate buttercream. Dip top of each cupcake in coconut to cover; set aside.
To make the turkey heads: Stick the point of a wet toothpick into the side of a marshmallow in two spots, about 1/2-inch apart. Fill the holes with chocolate sprinkles to resemble eyes. Cut a small triangular piece of gummy fish from the head of a fish, to resemble a beak. Cut a small slit in the marshmallow below the eyes, and insert the beak. Place marshmallow head on cupcake. Repeat with remaining marshmallows.
To make the tail feathers: Insert 4 gummy fish, tails first, into each cupcake across from the heads.