Scleroplax

{{Short description|Genus of crabs}}

{{Automatic taxobox

| taxon = Scleroplax

| image = FMIB_43464_Scleroplax_granulata.jpeg

| authority = Rathbun, 1894

}}

Scleroplax is a genus of crabs in the family Pinnotheridae.

Species of the genus Scleroplax live as a commensal of various burrowing animals including the mud shrimp Neotrypaea californiensis, N. gigas, Upogebia pugettensis and U. macginiteorum,{{cite journal |author=Ernesto Campos |year=2006 |title=Systematics of the genus Scleroplax Rathbun, 1893 (Crustacea: Brachyura: Pinnotheridae) |journal=Zootaxa |volume=1344 |pages=33–41 |doi=10.11646/zootaxa.1344.1.3 |url=http://mapress.com/zootaxa/2006f/zt01344p041.pdf }} and the echiuran worm Urechis caupo (known as the "fat innkeeper"),{{cite book |title=Polychaetes & Allies: the Southern Synthesis |volume=4, pt. 1 |series=Fauna of Australia: Polychaeta, Myzostomida, Pogonophora, Echiura, Sipuncula |editor1=Pamela L. Beesley |editor2=Graham J. B. Ross |editor3=Christopher J. Glasby |publisher=CSIRO Publishing |year=2000 |isbn=978-0-643-06571-0 |pages=353–374 |chapter=Phylum Echiura |author=Stanley J. Edmonds}} and occurs from Vancouver Island, British Columbia to Punta Abreojos, Mulegé, Baja California Sur, Mexico.