[Bernd Bussler]

You can never tell exactly how old a fish is, some do not grow properly by nursing errors and remain rather small, so you can not say how old he really is now. In addition, a Paro in intensive husbandry, for example, the duration approach very stressed and is only 3 Jaher old, where they also can be 5 to 7 years old, of course, absolutely. In any case, it is probably not a contagious disease.
Greeting Bernd