The lifespan of most nems is thought to be potentially in the hundreds of years or more from what I've read...the info in the article needs to be expanded on...what is typically sold as a "white Sabae" anemone is almost always a nem which should be tan or greenish/tan with colored tips...due to poor handling in the supply chain they are almost always very badly "bleached" by the time they reach the retailer...the uneducated consumer thinks the bright white with blue or purple tips looks really pretty and buys an animal that without a lot of TLC has been dealt a death sentence...many bleached nems can be brought back if you give them the necessary care...I personally have a H. crispa that was quite bleached when I received it...it has regained it's natural color and grown nicely in the 2+ years it's been in my tank.