It could be less obvious. ....maybe the name of the fish....
GOOGLE : MOONFISH
http://www.australianseafoodexports..../moonfish1.jpg
hmm... interesting... If the name does have anything to do with the game... then it could have a landscape similar to the moon landscape. I think that would cool. It would make designing transmissions and wheel systems difficult, but also very fun. Think of having to climb over bumpy terrain.....
or maybe even advanced sensors similar to what might be used on the moon.....
last year they added the IR recievers to simulate what it was like to talk to the mars rovers. I think it's very possible they want to simulate something else "NASA" related.