How long do a sea star live up to?

Sea anemones are Cnidarians, which means that they simply do not age, thus having the ability to live indefinitely. On average anemones usually live only 50-70 years, but this is usually due to falling prey to predators. Or, some other anemones live up to a decade. == ==
It is somewhere between 50 and 100 years also it may be just 1 year if you kill it of course i mean you could just get it and break it like rip it apart