Sorry if this is in the wrong section of the forum. Please move it if necessary.
I want to ask as the title says what exactly is this marbling effect. As far as i understand it, it is not a disease but some kind of reaction that some bettas undergo. Now i understand that this thing must be a genetic thingie that has to do with colouring. I am correct? Or is it something more serious?
If it isnt genetic is there a cause for it? Does the transition between colours effect the fish negatively and is there anything to do for it? Does died affect it?
Any advice is welcome!