Shadow fish are fish who appear to be skeletonized so basically they are fish bones that are colored black. There are two varieties of these. They both look the same but are encountered at different places. The only difference between these two are how many starfish from your Starzooka it takes to be rid of them. You only encounter these enemies in the water of the ocean. The first kind is encountered throughout some of the four levels in this world. These take about only one shot to kill. The second is encountered only in the King Angler boss battle and are the spawn of the king. These take three shots to kill. These ones maintain the same exact look with no differences in appearence whatsoever with their normal forms.