Problem With My Red Zebra

[fishfishfish]

my zebra has these strange dark marks on its mouth (corner)

and at the base of its dorsal fin and along the anal fin and also spreading to the lower half of the dorsal
http/i44.photobucket.com/albums/f44/mayonardo/HPIM0238.jpg

here is a full body shot
http/i44.photobucket.com/albums/f44/mayonardo/HPIM0236.jpg

 

[WILDER]

What colour are the marks, as black marks can be ammonia burns thats are healing, brown marks can be if dusty velvet, if fluffy columnaris.

 

[fishfishfish]

they are a darker brownish

 

[WILDER]

Is it a patch, dusting or fluffy, what are your water stats in ammonia,nitrite,nitrate,and ph, any signs of flicking and rubbing against objects, any laboured breathing, and excess mucas on the gills.

 

[fishfishfish]

3 of my sich including this 1 are rubbing on things.(sand)They are all zebras

 

[WILDER]

Sounds like velvet then.
http/www.skepticalaquarist.com/docs/heal...thprotist.shtml