Subject: Can a crayfish lay eggs that are not fertilized?

I am a science teacher (K-8 grades) and my 3rd graders learn about crayfish!  
We have a class crayfish that is approximately 9-15 months old and we 
think "she" has laid eggs. She has not been in a cage with a male crayfish 
since May 2003!  We are interested in knowing if these are eggs she has laid? 
(This is the first time since we have had her - got her 3/2003 - that we have 
seen eggs) and wonder if there is any possible way these eggs will be able to 
develop and hatch?  Thank you for your time?  Sherri Kohr

Re: Can a crayfish lay eggs that are not fertilized?