Sand dollar info.

[mr_alberta]

That's a hard question to answer. Factors like age of sand, depth of sand, etc play a huge roll in things. However, I haven't really seen very much information on long term survivability of any of the sand sifting animals. Aside from the one poster who has had his for 2 years, I haven't heard/read/seen anyone else with one that has lasted more than 1.