4 year old daughter and I noticed this guy at Petco Yesterday. Santa has promised her a fish so we go have a look once or twice a week to give Santa and idea and to waste some time. She noticed this little guy instantly he was rather active and seemed to be curious as to what was going on around him. They have him labeled as HM DT PK and I can only assume that is correct but I would definitely agree with the DT PK part. I am not 100% clear on the HM guides in general. Also not sure about the color I would probably say multicolor because i don't think he fits into anything else. The one thing that really stands out is his pink-purple-blue iridescent shine. My daughter says that he was glowing and also that he was a firefish, lighting up like a firefly.
I attached some pics. They were made with a phone at the store in his plastic container. Hopefully i will post more.