Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper or lightly grease it.
In a mixing bowl, combine the crab meat, cream cheese, cheddar cheese, mayonnaise, Dijon mustard, parsley, garlic powder, salt, and pepper. Mix until well combined.
Open the can of crescent roll dough and unroll it on a flat surface. Separate the dough into triangles along the perforated lines.
Take a spoonful of the crab mixture and place it in the center of each crescent triangle.
Fold the points of the dough over the filling, pinching to seal the edges. You can also roll them up, starting from the larger end of the triangle.
Place the prepared bites on the baking sheet, leaving some space between each.
Bake in the preheated oven for 12-15 minutes, or until the crescents are golden brown and the filling is hot.
Remove from the oven and allow to cool for a few minutes before serving.