Halimeda crab

There are several kinds of crabs found among the varieties of Halimeda algae, and this arrowhead species was especially large. Having carefully attached two small segments of Halimeda algae to the top of its rostrum, it also displayed a behavioral "rocking" back and forth as it moved, imitating the algae as it sways slightly back and forth in the surge. 10mm wide

28 February 2016

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