This research was held on October 20th – desember 20th 2006, in laboratory Indoor Fishery, Animal Husbandry and Fishery University of Muhammadiyah Malang. The purpose of this reaserch is to know the growth and survival rate crayfish / crawfish (Cherax quadricarinatus) in which expansion on extreme density unit difference spreading and to know is how much is giving and growth of survival rate best of freshwater crayfish (Cherax quadricarinatus) in extreme density unit.
