sheding of skin

Question
I Have a White Tip Shark .I Noticed that the skin has come off and u
are seeing the flesh of the shark .what may be happen to the shark

Answer
When the skin comes off, the shark has been affected by Ammonia Poisoning.  It literally burns the skin off.

Change his water thoroughly, vacuum gravel, and clean his filtration.  Keep his tank much cleaner from here forward.  

Skin loss is caused by dirty water...and even if it looks clean to you, it's not.

Happy fish-keeping. :)