Thanks for the info, I believe it's the Yellow/Canary wrasse, Halichoeres chrysus (LFS called it banana).If by Banana wrasse you mean Thalassoma lutescens, it can get up to a foot long and is not reef safe. It will likely not allow any other wrasses.
What wrasse are you referring to as Lime wrasse? That's also a common name for the above Banana wrasse.
Ended up getting one as it seems to be peaceful and reef safe. It buries into the sand to hide. I was going to buy a separation box, but had already racked up a bit of a bill, so I thought I'd leave it purely for the fact this guy hid in the sand. See how things go when it comes back out but at the moment it's hid somewhere.