Before you jump to any conclusions, just know that hippo tangs can do some weird stuff. LOL
Mine slides in between the rocks, sideways and jams himself under neath rocks sometimes to sleep. He doesnt "flash" on the sand but does on the rocks from time to time. I've had mine for a couple years and he has never ever had any white spots on him, he is just weird. LOL
Keep an eye on him real close for a few more days, they are in fact ich magnets but thats always the answer with them, they are plain ole' weird fish lol
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.