Java Fern pruning(?)

Hi all,

What do you do when a Java Fern becomes too large?

Some time ago, I bought a Java Fern from George Booth 
(and a nice specimen it was). Well, now it's huge!
It occupies the upper left quadrant of my 90 gallon

It's a little too big. What should I do? Can you divide
these things? Or should I just move it? 

cheers (and thanks),
Bill Edwards 
Survey Research Lab 
Arizona State University