I called LA crawfish and had them ship out 50lbs which arrived alive and kicking. Spread them out across the pond edges in the riprap, and never saw one.....until last spring they were everywhere big and little ones so I guess they just burrowed into the mud and made mad cajun love. I didn't see them that often after mid-summer so maybe its a time thing. I spotted most of them after feeding the fish and some of the chow would wash up on the bank and they would crawl out from under the rocks to eat.