Originally posted by David A:
That bothered me too. And why was Zoidberg blue? Bender's color change was explained, and the other characters presumedly had dyed their hair, but what about Zoidy? Also, parallel Amy looked kinda Caucasian to me. Maybe it was just her hair though.
Maybe one of Zoidberg's ancestors flipped a coin (or whatever Decapodians use as currency - clams?) to decide when to mate. The different time in Universe 1 meant that different gametes fused, creating the blue phenotype. The blue characteristic could then have been passed on to Zoidberg. If this chance event happened several generations before Zoidberg, it would mean that there were no other differences between the two Zoidbergs in regards to job, personality and so on, as their lives would have been the same, apart from the colour.
I think that makes sense...