colour changing mad fish?

[Loopyness]

does anyone know why my red fin shark is changing colour? His fins are suppose to be red right? and now they are turning black..any ideas?

 

[drobbins27]

PMS? lol answer to everything

 

[FishAddiction]

is it completly black or like black dots? cause if its black dots wont that mean ammonia burns?

 

[Angel Lady]

what is your ph that will make them change colors a change in ph.

 

[pufferdude]

He could be stressed out or he might have some type of disease.