HCA: Hermit Crab Association

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hello does anyone here know how big C. rugosus can get?i tried looking up online but there really isnt much info telling me how big they can exactly get?

Hello! im new here and im from indonesia. im planning to keep a hermit crab but im not sure which one to keep? the one available here are C. perlatus C. brevimanus C. lila C. cavipes C. violascens C. rugosus i was planning to get brevimanus but i saw on the internet that brevimanus are the biggest c...