Hey Geo7x
Gorgeous Arabesque you have there. I'm leaning towards male, but I think you'll have to wait a few months, let he/she eat more and then see. The beaut in our sig is our lovely girl Arabella. She is a stunning specimen. We have a male too, but he isn't as photo mad as she is. She normally poses lovely for me, while Arry tends to swim off, with a screaming look on his face
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The white blotch's look like stress marks. Nothing to worry about, once settled they become less apparent. Our pic of Arabella looks like she has those, but looking at the original I see it was just debris floating by
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What have you got to feed your sweetie pie?? Our two love JMC catfish pellets, Serra catfish chips, frozen shrimp from Asda (obviously defrosted and only once every 10 days or so), blood worms and our female adores blanched courgette, cucumber and potato.
You may find this beaut tends to hide away now for quite a while. If you're worried about whether he/she is feeding, only put food in once lights are out. They are nocturnal, but I have found, eventually with both our L260's they come out more during the day, especially when they learn that food doesn't only come once lights out.
Good luck and congrats again. Great little plecs to keep and so amazingly beautiful.
P.S. Your little one isn't skinny, if there was sever weight loss, the belly would be sunken and I don't see that in your pic. It has the body shape of our male, that's why I tend to think male. But leave it a few weeks or months and post some pics from the top, side and belly if possible and we'll see then
I'd say he/she is about 2 and a half/ 3 inches something like that. He/she is acclimating now. Pics to come! hopefully you can tell me if its a he or a she too. 
