Place foil on a baking sheet and spray with non-stick spray.
Combine coconut, bread crumbs, and crackers in a bowl. Put egg whites in another bowl.
Dip the tilapia in the egg, then in the coconut crumb mixture. Place them on the prepared baking sheet.
Bake for 15-20 minutes, or until tilapia is done. (Check tilapia at about 15 minutes so it won't burn.)
Notes
To crush Ritz crackers, you can’t go wrong with a Ziploc bag and a rolling pin. Add the crackers, remove the air from the bag, seal tight, and then roll (or bang) away with the rolling pin. Also, for the ¼ cup Ritz Crackers called for in this recipe, you’ll need about 6 crackers. We used sweetened coconut when we made this tasty dish, but plain, unsweetened coconut will work as well. We liked the hint of sweet it added to the dish, but make it according to your desired tastes or with whatever you have on hand.