They are in fact classified as "tube anemone".there are area my types of colours ranging from colorless to ultra bright red,purple ,and orange etc....
If u bought a colourless type,then,it will be their natural skin after all.however,from the photo,if it is a bleach tube amemone,it will regain its original colour in no time,provided that u feed them small market prawns twice a week,or so..... Do take note that this tube amemone is aggressive,and their stings can kill a small fish or shrimps with their toxic tenacles.u need to space them apart or isolate them to a corner.
You may also refer to this websites for more information
http://www.aquacon.com/anemone.html