Heat oven as directed on fish fillet package. Place fish fillets on ungreased cookie sheet; sprinkle with chili powder. Bake as directed.
Remove fish from oven. Heat taco shells as directed on package. Meanwhile, remove pit and peel from avocado; cut avocado into small cubes. Cut warm fish into bite-sized pieces.
To serve, spoon heaping tablespoon coleslaw into each warm taco shell. Top each with fish, avocado and salsa.