Mix together milk, vanilla pudding mix, and food coloring in the bowl you will use to serve the dessert. Set aside to thicken.
Meanwhile, crush the vanilla sandwich cookies in a food processor or high speed blender until it resembles a coarse sand-like texture.
Scoop some of the pudding from one side to the middle of the bowl.
Add the cookie crumbs to that side to look like a beach.
Add candy fish to the top of the pudding.
Chill until ready to serve.