im alittle late on the finding this article. congrats on the spawn but i figured id share some of my experiences with the eggs. ive had a one of the blue crayfish for over a year now and twice it has produced eggs under its tail. the first time nothin happened and we'll see what comes out of this second batch. as i just noticed it last week. its the only crawfish so there is no male to fertilize it. its bizarre.