It was me. I was trying to get a quoyi so I bought it before looking at the picture. Was waiting with credit card in hand/etc; got my receipt email before the Divers Den update email arrived - then I looked at the picture and went ahh,what did I just buy??? I'll second Kevin, LA did call and email to let me know it was mislabeled.
Anyway, information is scarce on s. rivulatus in an aquarium. It sounds like he will get bigger than a quoyi, but I haven't found any additional substantive information so sounds like he will be the guinea pig!
I opted for Sat delivery so I have a couple days to wait.
-Matt