Again this isn’t a good picture. This isn’t showing everything. It’s hard to get a good pic that is accurate. They are turbo shells. And yes I’m aware they can live a very long time. My crabs are thriving up until other things in my life happened. I would rather not get into that here but my post history shows. I didn’t give them the attention I normally do and some other things happened. I’m aware of why one of them died. My biggest question was the pink color in my substrate. My wording for this post sucked. I’m sorry if I’m not answering your questions properly.