It looks similar to my Nem. It too has grown huge. When I bought it, it was pale white with a hint of purple to it. Since then it has darkened up and really thrived. It is very nice.... a lot of action in the current.
Has your clown hosted it? Mine wont touch it. They are tank raised percs. I did purchase a nem crab and he is very cool. He moves all around the nem and is a blast to watch.
BTW...my tank is 72 gal... Sometimes I too think I need a bigger tank with my nem...... it is a never ending urge....need.....for something larger.....