Dark spot on clown

[Zhivana]

Hello again. This one has recently been shipped and has some dark spot clearly visible on both sides:
left

right

For some reason it disturbs me a lot.
What is that?

[chefkeith]

Looks like a natural beauty mark (pigmentation defect). I have a clown that has a whitish colored beauty mark. Nothing wrong with it, other than being unique.

[Zhivana]

Thanks, chefkeith.
I would be happy to relax, but it really looks more like some nasty problem with internal organs showing through skin. And after several days the spots had gotten darker

[Zhivana]

Here's a new photo, the spot is clearly darker than it was. And on the second clown there's a similar one, not so visible yet, but there it is.

[chefkeith]

I've seen black spots being caused by sudden water parameter changes also. If that isn't the problem, then I don't know what else to tell you other than you should quarantine and treat any new fish for the most common parasites. You shouldn't trust new arrivals even if they looked perfectly healthy.

[JonasBygdemo]

Do you have any non-organic decorations that isn't intended for aquarium use? I've heard that some plastics kan give fish dark spots, however if only one fish have this problem, it's probably not it.

Beautiful tank by the way!

[sesuna]

In store they Bike Shop
were giving out the incorrect rebate form ($10 off, not $25 like Macy's website said). Macy's website was not
working to print out the $25 rebate form yesterday, and no Bike Store
one with the 1-800 customer service line will help.
Does Bike Trial Seller
ANYONE have the $25 Pandigital rebate form from Macys that they can send me? It was for this past weekend's sales
Bike Trials