I bought Nightcrawlers from a bait shop,to use for fishing.I never did use them all up,and I threw them in the back of the fridge.I didn't go fishing again for about a month,because it was too cold,so next time I decided to go,I opened up the container,and to my surprise their were eggs,and little worms,with the big old nightcrawlers.Baitshop worms will reproduce,and that is a fact.I've been raising worms for years.PEACE