I have two Havanensis, each in it's own 12 gal. cube. Their personalities are close to each others. They are very active and interact with me all day long. They are always building or rebuilding something as I have to add rubble often. They are 2'' and 2 /12" long. I feed them a occasional hermit, but their main diet is Krill, octopus, and shrimp. Hope this helps. Good luck.
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