Calappa cf calappa (Linnaeus, 1758)
40mm

We suspect this is a variety of Calappa calappa, but having seen two crabs with this unusual pattern, we decided to keep it separate for now. These were found in Halimeda patches on a Kwajalein Atoll lagoon reef. We called this one the "batman crab" since the brown mark has a slight resemblance to the Batman symbol.

Created 12 September 2018

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