The first link you have up is identical to the Chinese Alge Eater that I bought from a very reputibal fish store. There is also a Gold CHinese alge eater that I've seen on the internet that looks very similiar to your second link, and the third link I also beleive to be CAE. The younger they are the more pronounced coloring they have, eventually it will fade (that is if it truly is a CAE). Mine is only about 2" right now I do plan on keeping her since I should be upgrading to a 90gal., I have already noticed her chasing a couple of my Mollies. (I think they deserve it sometimes
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