Green Tang??? Anyone heard of these?

A LFS by me has "Green Tangs" for sale, I tried doing some research on them, but I have never seen them for sale anywhere on the internet. Are they misleading people? Is there any such thing? They sell them for like $10. Could they be a juvenile of some larger tang? They are mostly sold at about 1- 1 1/2 " long. They kind of look like a Convict Tang, but with no stripes, just a solid shimmery color.
Just curious if anyone else has seen these?