I've kept amano shimp for years, and as RTR has said they can live for 1-2 years sometimes longer but very rare. Jmo but the problem I have had with them is that they are very sensitive to changes in the water. Especialy when I moved them into another tank. What I did to fix this problem was to very, very , very slowly acclimatize them over a period of about 4-8 hours.This way when i moved them or bought new ones i have been able to minimize losses.