The white areas? Could be vitiligo. If so, not a problem and also not something you can cure.
The pictures aren't clear, though, so I'm not sure if there is a slime-coat issue or not. Plus, there might be something "wrong" with the gills - they are on the stumpy side. (Some axies have pretty stumpy gills even when there is nothing wrong with them.) So, lets pretend there is something wrong with your axie (even though there might not be) and ask questions.
What are your water parameters (ammonia, nitrite, nitrate, pH and temperature)? Any other tank mates (particularly, any fish that could be picking on the gills)? Can you get more pictures? (If you can get some side and top pictures, we can tell you if you have a he or a she.)