Use estimates carefully
Hobby references commonly describe freshwater dwarf shrimp as living around one to a few years, but exact Neocaridina lifespan varies by source, line, temperature, and rearing conditions.
A shrimp may already be partway through its life when it arrives, and there is no reliable visual age test for every individual. A sudden death is not automatically old age.
Focus on the factors you can control
Provide stable water, suitable food, a cycled filter, and a low-stress environment. Keep notes on when the shrimp arrived and whether the colony shows a repeated pattern of early losses.
Avoid promising a specific lifespan from one temperature or product. If multiple shrimp die unexpectedly, test the water and review recent changes before attributing it to age.
For your own tank
If you are tracking age, record the arrival date but remember that shrimp may already be mature. A colony can replace older animals through breeding, so population turnover may hide individual lifespans. Focus on repeated losses and care conditions, not a guaranteed age milestone.
Use these as general hobby references. Test your aquarium and confirm product guidance before making changes.