Agriculture, Fisheries and Conservation Department



Life History and Behaviour

Life History and Behaviour

How do they "breathe"?

[Book-like gills of horseshoe crab ]
Book-like gills of horseshoe crab

Like other marine invertebrates, horseshoe crabs obtain oxygen from water through their gills which look like pages of a book and are located on the underside of the abdomen. When exposed on a beach, horseshoe crabs can also obtain oxygen from the air, but their gills have to be moist enough to do so.

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Last Review Date : 09 August 2013