Identifying Good/Bad hitchhikers

[seamonkey]

yesterday i read a post somewhere that had some links for external sites with lists and photos of good/bad hitchhikers and tank creatures. i meant to save the links but never did. (duh)
specifically i am interested in this little deformed/asymmetrical looking starfish. could someone tell me where to find this post or PM me the links? thanks...

 

[Deanos]

There is a post 'stickyed' atop the Reefs for Beginners' forum.