Read what I found

[racoloish]

Well maybe some of u know that I buy some marble Crayfish a couple months ago. They were small less than an inch. Today I look in to their apartment and I see like 3 or 4 small 1/2 in crayfish. But I don't understand, don't they suppose to lay eggs? Maybe she had eggs and I don't notice. Should I move their pvc apartment to see if there's more? Here are some old pics of them?
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Try to make the pics don't rotate but they rotated. Hope it look fine.

[Andrews]

You probably just missed when they berried. Whether or not you check is up too you, marbled crays won't show aggression towards their young outside of small tiffs, I'd do it to satisfy curiosity though

[mommy1]

Yup, I would have to look and see if there were more too.

[Crispy]

not sure where you live, but around here marble crays are an invasive species and illegal. they are self-cloning and do not need a mate to reproduce. they keep the eggs/fry under their tails.