Hey, I'm looking to get a motoro for my first ray. I have my tank all set up and cycling. I found a nice healthy looking female for $190 and she's about 8-9" but she doesn't seem that active. I've also found a smaller gal for $150 that is about 6" and she is very active but the only thing is that her spots look like someone smudged them. Does anyone know what caused that? As well as what one would be better to get?