If you mean crayfish, they breed easily, but unpredictably in captivity. The wild reds are the easiest. The odd colors like blue, red and white are a lot trickier.

Set up a couple of 20 gallon tanks with 1 male and 3 females and lots of hides in one tank. Put a bunch of snails in the other tank to maintain the cycle. PVC pipes cut to size work well for hides. Set lighting for no more than 6 hours a day, but give them lighting. Keep the tank cool, like in the 60's for a month and feed sparingly. Then bring water temps up to the mid 70's and set the lighting to 12 hours a day.

Once you have females with a berry, remove the male. When the female drops the babies, remove her too. You can get 2 to 3 berries a year with 100+ babies each time. Grow-out can be challenging as the babies can be cannibals.