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I totally agree that this is a different question to the other one. But rock crabs, despite their obvious name, are actually fine with sea water, but they need to breathe a little once in a while. They swim in the water-never in the middle of the ocean, unless swept away by a wave-and always land back onto the underside of a rock, that is submerged halfway or wholeway out of the water. Whatever the place, they need to be near land, or preferably rocks.

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15y ago

What else can I help you with?