The following table lists the species in this taxon assessed under the Singapore Red List, which is also published in the third edition of the Singapore Red Data Book.

You may find information for the conservation statuses assessed in the second edition Singapore Red Data Book (RDB2) and third edition Singapore Red Data Book (RDB3).

The information below is accurate as at the time of the listing online for the taxon.

Checklist of Arthropoda - Horseshoe Crab (Order: Xiphosurida) and Marine Decapod Crustacean (Order: Decapoda) Species with their Category of Threat Status for Singapore

Prepared by Jose Christopher E. Mendoza, Bee Yan Lee, Peter K.L. Ng, Darren C.J. Yeo

Family	Genus	Species	Authority	Common Name	RDB2	RDB3
Limulidae	Carcinoscorpius	rotundicauda	(Latreille, 1802)	Mangrove horseshoe crab	VU	VU
Limulidae	Tachypleus	gigas	(Müller, 1785)	Coastal horseshoe crab	EN	VU
Palaemonidae	Cristimenes	cristimanus	(Bruce, 1965)	Black urchin shrimp	VU	VU
Palaemonidae	Cuapetes	johnsoni	(Bruce, 1987)	Seagrass shrimp	VU	CR
Alpheidae	Alpheus	microrhynchus	De Man, 1898	Giant mangrove snapping shrimp	EN	EN
Alpheidae	Athanas	japonicus	Kubo, 1936		VU	VU
Alpheidae	Athanas	polymorphus	Kemp, 1915		VU	VU
Alpheidae	Potamalpheops	johnsoni	Anker, 2003	Brackish alpheid shrimp	VU	EN
Alpheidae	Potamalpheops	tigger	Yeo & Ng, 1997	Brackish alpheid shrimp	VU	VU
Alpheidae	Salmoneus	singaporensis	Anker, 2003		CR	CR
Alpheidae	Synalpheus	stimpsoni	(De Man, 1888)	Crinoid snapping shrimp	CR	EN
Thalassinidae	Thalassina	anomala	(Herbst, 1804)	Mud lobster	EN	EN
Thalassinidae	Thalassina	gracilis	Dana, 1852	Mud lobster	EN	EN
Upogebiidae	Wolffogebia	phuketensis	Sakai, 1982	Mud shrimp	EN	EN
Porcellanidae	Eulenaios	cometes	(Walker, 1887)	Parchment worm porcelain crab	EN	EN
Porcellanidae	Porcellanella	triloba	White, 1851	Painted porcelain crab	VU	VU
Porcellanidae	Pseudoporcellanella	manoliensis	Sankarankutty, 1961	False porcelain crab	VU	VU
Porcellanidae	Raphidopus	ciliatus	Stimpson, 1858	Hairy-leg porcelain crab	VU	VU
Coenobitidae	Coenobita	violascens	Heller, 1862	Land hermit crab	VU	DD
Coenobitidae	Coenobita	lila	Rahayu, Shih & Ng, 2016	Land hermit crab	VU	NT
Calappidae	Calappa	lophos	(Herbst, 1782)	Common box crab	VU	VU
Calappidae	Calappa	philargius	(Linnaeus, 1758	Spectacled box crab; Spotted box crab	VU	NT
Calappidae	Calappa	hepatica	(Linnaeus, 1758	Reef box crab	VU	VU
Leucosiidae	Favus	granulatus	Lanchester, 1900	Rubble crab; Singapore rubble crab	EN	EN
Leucosiidae	Praosia	punctata	Tan & Ng, 1993	Cheryl crab; Mangrove pebble crab	EN	EN
Leucosiidae	Alox	somphos	Tan & Ng, 1995	Spongy rubble crab	EN	EN
Epialtidae	Doclea	canaliformis	Ow-Yang, in Lovett, 1981	Channeled spider crab	EN	VU
Epialtidae	Hyastenus	elatus	Griffin & Tranter, 1986		EN	DD
Epialtidae	Hyastenus	subinermis	Zehntner, 1894		EN	VU
Epialtidae	Menaethius	monoceros	(Latreille, 1825)	Arrow-head spider crab; One-horned spider crab	VU	NT
Inachidae	Camposcia	retusa	Latreille, 1829	Velcro crab; Decorator crab	VU	NT
Inachidae	Paratymolus	cygnus	Loh & Ng, 1999		CR	EN
Majidae	Planotergum	mirabile	Balss, 1935		EN	DD
Hymenosomatidae	Crustaenia	palawanensis	(Serène, 1971)	False spider crab	EN	EN
Hymenosomatidae	Elamena	globosa	Chuang & Ng, 1991	False spider crab	EN	CR
Hymenosomatidae	Elamena	mendosa	Chuang & Ng, 1991	False spider crab	EN	EN
Hymenosomatidae	Elamenopsis	rotunda	Naruse & Ng, 2007	Circular false spider crab	CR	CR
Hymenosomatidae	Lucascinus	coralicola	(Rathbun, 1909)	False spider crab	VU	VU
Hymenosomatidae	Neorhynchoplax	mangalis	(Ng, 1988)	Mangrove false spider crab; Mangrove crown crab	VU	NT
Parthenopidae	Aulacolambrus	granulosus	(Miers, 1879)	Elbow crab	CR	DD
Parthenopidae	Daldorfia	horrida	(Linnaeus, 1758)	Horrid elbow crab	NEx	CR
Parthenopidae	Enoplolampbrus	echinatus	(Herbst, 1790)	Elbow crab	EN	VU
Parthenopidae	Pseudolambrus	bicornis	(Flipse, 1930)	Two-horned elbow crab	CR	CR
Parthenopidae	Rhinolambrus	pelagicus	(Rüppell, 1830)	Common elbow crab	VU	VU
Parthenopidae	Cryptopodia	fornicata	(Fabricius, 1787)	Domed elbow crab	EN	VU
Corystidae	Gomeza	bicornis	Gray, 1831	Masked burrowing crab	VU	VU
Corystidae	Jonas	formosae	(Balss, 1922)	Masked burrowing crab	VU	EN
Portunidae	Lupocyclus	rotundatus	Adams & White, 1849	Swimming crab	NEx	EN
Carpiliidae	Carpilius	maculatus	(Linnaeus, 1758)	Spotted reef crab	EN	EN
Eriphiidae	Eriphia	ferox	Koh & Ng, 2008	Red-eyed reef crab; Ferocious reef crab	VU	VU
Pilumnidae	Glabropilumnus	edamensis	(De Man, 1888)		VU	VU
Pilumnidae	Gonatonotus	pentagonus	White, 1847	Sea urchin crab	EN	EN
Pilumnidae	Harrovia	albolineata	Adams & White, 1849	Feather star crab	CR	VU
Pilumnidae	Harrovia	longipes	Lanchester, 1900	Feather star crab	CR	VU
Xanthidae	Hypocolpus	rugosus	(Henderson, 1893)	Reef crab	CR	EN
Pilumnidae	Mertonia	lanka	Laurie, 1906		VU	EN
Galenidae	Parapanope	euagora	De Man, 1895		EN	EN
Pilumnidae	Pilumnus	murphyi	Ng, 1988		VU	EN
Pilumnidae	Pilumnus	ohshimai	Takeda & Miyake, 1970		EN	EN
Pilumnidae	Vellumnus	labyrinthicus	(Miers, 1884)		VU	EN
Pilumnidae	Rhabdonotus	pictus	A. Milne-Edwards, 1879		EN	EN
Pilumnidae	Rhizopoides	yangae	(Ng, 1985)		CR	CR
Pilumnidae	Zebrida	adamsii	White, 1847	Zebra crab; Zebra urchin crab	EN	EN
Trapeziidae	Trapezia	cymodoce	(Herbst, 1801)	Lilac coral crab; Red coral crab	VU	VU
Tetraliidae	Tetralia	nigrolineata	Serène & Pham, 1957	Bandit coral crab	CR	EN
Xanthidae	Atergatis	floridus	(Linnaeus, 1767)	Green egg crab; Floral egg crab	VU	VU
Xanthidae	Atergatis	integerrimus	(Lamarck, 1818)	Red egg crab	VU	NT
Xanthidae	Banareia	subglobosa	(Stimpson, 1858)		EN	EN
Xanthidae	Cymo	andreossyi	(Audouin, 1826)	Hairy coral crab	VU	VU
Xanthidae	Lophozozymus	pictor	(Fabricius, 1798)	Mosaic reef crab	EN	NT
Xanthidae	Neoxanthops	lineatus	(A. Milne-Edwards, 1867)	Lined reef crab	EN	EN
Xanthidae	Novactaea	bella	Guinot, 1976		EN	EN
Xanthidae	Palapedia	valentini	Ng, 1993		VU	EN
Xanthidae	Platypodia	granulosa	(Rüppell, 1830)	Curry puff crab	EN	VU
Xanthidae	Trichia	horii	Miyake, 1940	Paddington bear crab	CR	CR
Dotillidae	Dotilla	myctiroides	(H. Milne Edwards, 1852)	Soldier crab	VU	LC
Dotillidae	Ilyoplax	delsmani	De Man, 1926	White semaphore crab	VU	VU
Ocypodidae	Ocypode	cordimanus	Latreille, 1818	Smooth-handed ghost crab; Smooth-eyed ghost crab	VU	EN
Ocypodidae	Tubuca	rosea	(Tweedie, 1937)	Rosy fiddler crab	EN	VU
Gecarcinidae	Tuerkayana	hirtipes	(Dana, 1852)	Blue land crab	Not Listed	EN
Sesarmidae	Sarmatium	germaini	(A. Milne-Edwards, 1869)	Mound crab	EN	NT
Sesarmidae	Sesarmoides	borneensis	(Tweedie, 1950)		EN	EN
Sesarmidae	Haberma	nanum	Ng & Schubart, 2002	Grasping land sesarmid	VU	NT
Camptandriidae	Baruna	trigranulum	(Dai & Song, 1986)	Crevice crab	Not Listed	LC
Camptandriidae	Ilyogynnis	microcheirum	(Tweedie, 1937)	Common silt crab	Not Listed	LC
Camptandriidae	Moguai	elongatum	(Rathbun, 1931)		Not Listed	NE
Camptandriidae	Paracleistostoma	depressum	De Man, 1895	Red silt crab	Not Listed	LC
Camptandriidae	Paracleistostoma	longimanum	Tweedie, 1937		Not Listed	NE
Camptandriidae	Paracleistostoma	wardi	(Rathbun, 1926)		Not Listed	NE
Dorippidae	Neodorippe	callida	(Fabricius, 1798)	Leaf porter crab	Not Listed	NE
Dotillidae	Dotilla	wichmani	De Man, 1892	Wichman's soldier crab	Not Listed	NE
Dotillidae	Ilyoplax	lingulata	(Rathbun, 1909)		Not Listed	NE
Dotillidae	Ilyoplax	longicarpa	Tweedie, 1918		Not Listed	NE
Dotillidae	Ilyoplax	obliqua	Tweedie, 1935	Tweedies' semaphore crab	Not Listed	NE
Dotillidae	Ilyoplax	punctata	Tweedie, 1935		Not Listed	NE
Dotillidae	Scopimera	intermedia	Balss, 1934		Not Listed	LC
Dotillidae	Shenius	anomalus	(Shen, 1935)	Shen crab	Not Listed	NE
Epialtidae	Doclea	armata	De Haan, 1839		Not Listed	NE
Epialtidae	Doclea	ovis	(Fabricius, 1787)		Not Listed	NE
Epialtidae	Doclea	rissoni	Leach, 1815		Not Listed	NE
Epialtidae	Hyastenus	whitei	Griffin, 1976		Not Listed	NE
Epialtidae	Phalangipus	indicus	(Leach, 1815)		Not Listed	NE
Epialtidae	Phalangipus	longipes	(Linnaeus, 1758)		Not Listed	NE
Epialtidae	Phalangipus	malakkensis	Griffin, 1973		Not Listed	NE
Epialtidae	Tylocarcinus	styx	(Herbst, 1803)	Underworld spider crab	Not Listed	NE
Epialtidae	Xenocarcinus	tuberculatus	White, 1847	Wire coral crab	Not Listed	NE
Grapsidae	Metopograpsus	frontalis	Miers, 1880	Purple climber crab	Not Listed	NE
Grapsidae	Metopograpsus	latifrons	(White, 1847)	Purple climber crab	Not Listed	NE
Inachidae	Achaeus	brevirostris	(Haswell, 1879)		Not Listed	NE
Inachidae	Achaeus	lacertosus	Stimpson, 1858		Not Listed	NE
Inachidae	Achaeus	lorina	(Adams & White, 1848)		Not Listed	NE
Inachidae	Litosus	sexspinosus	(Miers, 1884)		Not Listed	NE
Inachidae	Oncinopus	araneus	(De Haan, 1839)		Not Listed	NE
Inachidae	Oncinopus	neptunus	Adams & White, 1848		Not Listed	NE
Leucosiidae	Paranursia	abbreviata	(Bell, 1855)		Not Listed	NT
Leucosiidae	Philyra	malefactrix	(Kemp, 1915)	Mangrove pebble crab; Millet crab	Not Listed	NE
Macrophthalmidae	Macrophthalmus (Mareotis)	crinitus	Rathbun, 1913		Not Listed	NE
Majidae	Holthuija	miersii	(Walker, 1887)		Not Listed	NE
Majidae	Micippa	curtispina	Haswell, 1880		Not Listed	NE
Majidae	Micippa	excavata	Lanchester, 1900		Not Listed	NE
Majidae	Micippa	philyra	(Herbst, 1803)		Not Listed	NE
Majidae	Prismatopus	aculeatus	(H. Milne Edwards, 1834)		Not Listed	NE
Majidae	Prismatopus	halimoides	(Miers, 1879)		Not Listed	NE
Majidae	Schizophrys	aspera	(H. Milne Edwards, 1831	Sea toad spider crab	Not Listed	NE
Majidae	Schizophrys	dama	(Herbst, 1804)	Sea toad spider crab	Not Listed	NE
Menippidae	Myomenippe	hardwickii	(Gray, 1831)	Stone crab; Thunder crab	Not Listed	LC
Ocypodidae	Ocypode	ceratophthalmus	(Pallas, 1772)	Horn-eyed ghost crab	Not Listed	LC
Ocypodidae	Gelasimus	vocans	(Linnaeus, 1758)	Orange fiddler crab	Not Listed	NE
Ocypodidae	Paraleptuca	annulipes	(H. Milne Edwards, 1837)	Porcelain fiddler crab	Not Listed	NE
Ocypodidae	Paraleptuca	perplexa	(H. Milne Edwards, 1837)	Lemon clawed fiddler crab	Not Listed	NE
Ocypodidae	Tubuca	dussumieri	(H. Milne Edwards, 1852)	Purple fiddler crab	Not Listed	NE
Ocypodidae	Tubuca	forcipata	(Adams & White, 1849)		Not Listed	NE
Ocypodidae	Tubuca	paradussumieri	Bott, 1973	Purple fiddler crab	Not Listed	NE
Ocypodidae	Tubuca	rhizophoriae	Tweedie, 1950		Not Listed	NE
Oziidae	Epixanthus	dentatus	(White, 1848)	Forceps crab; Mangrove forceps crab; Long fingered peeler crab	Not Listed	NE
Oziidae	Ozius	guttatus	H. Milne Edwards, 1834	Spotted-belly forceps crab	Not Listed	NE
Pilumnidae	Aniptumnus	quadridentatus	(De Man, 1895)		Not Listed	NE
Pilumnidae	Heteropanope	glabra	Stimpson, 1858	Pebble crab	Not Listed	NE
Pilumnidae	Heteropilumnus	sasekumari	Serène, 1971		Not Listed	NE
Portunidae	Portunus	pelagicus	(Linnaeus, 1758)	Flower crab	Not Listed	NE
Portunidae	Scylla	olivacea	(Herbst, 1796)	Orange mud crab	Not Listed	NE
Portunidae	Scylla	paramamosain	Estampador, 1949	Green mud crab	Not Listed	NE
Portunidae	Scylla	serrata	(Forskål, 1775)	Giant mud crab; Indo-Pacific swamp crab; Sri Lanka crab; Giant green crab	Not Listed	NE
Portunidae	Scylla	tranquebarica	(Fabricius, 1798)	Purple mud crab	Not Listed	NE
Sesarmidae	Clistocoeloma	merguiense	De Man, 1888		Not Listed	NE
Sesarmidae	Episesarma	chentongense	(Serène & Soh, 1967)	Pink-fingered tree-climbing crab; Pink-fingered vinegar crab	Not Listed	NE
Sesarmidae	Episesarma	mederi	(H. Milne Edwards, 1853)	Thai vinegar crab; Red claw crab	Not Listed	NE
Sesarmidae	Episesarma	palawanense	(Rathbun, 1914)	Rathbun's vinegar crab	Not Listed	NE
Sesarmidae	Episesarma	singaporense	(Tweedie, 1936)	Singapore tree-climbing crab; Singapore vinegar crab	Not Listed	NE
Sesarmidae	Episesarma	versicolor	(Tweedie, 1940)	Violet tree-climbing crab; Violet vinegar crab; Purple white claw	Not Listed	NE
Sesarmidae	Fasciama	fasciatum	(Lanchester, 1900)		Not Listed	NE
Sesarmidae	Lithoselatium	kusu	Schubart, Liu & Ng, 2009	Kusu rock crab	Not Listed	NE
Sesarmidae	Nanosesarma	batavicum	(Moreira, 1903)		Not Listed	NE
Sesarmidae	Nanosesarma	minutum	(De Man, 1887)		Not Listed	NE
Sesarmidae	Nanosesarma	pontianacense	(De Man, 1895)		Not Listed	NE
Sesarmidae	Neosarmatium	smithi	(H. Milne Edwards, 1853)		Not Listed	NE
Sesarmidae	Neosarmatium	indicum	(A. Milne-Edwards, 1898)		Not Listed	NE
Sesarmidae	Neosesarma	gemmiferum	(Tweedie, 1936)		Not Listed	NE
Sesarmidae	Neosesarma	rectipectinatum	(Tweedie, 1950)		Not Listed	NE
Sesarmidae	Parasesarma	eumolpe	(De Man, 1895)	Face-banded sesarmine crab	Not Listed	NE
Sesarmidae	Parasesarma	indiarum	(Tweedie, 1940)	Face-banded sesarmine crab	Not Listed	NE
Sesarmidae	Sarmatium	striaticarpus	Davie, 1992		Not Listed	NE
Sesarmidae	Selatium	brockii	(De Man, 1887)	Mangrove tree-dwelling crab	Not Listed	NE
Sesarmidae	Tiomanium	indicum	(H. Milne Edwards, 1837)		Not Listed	NE
Varunidae	Metaplax	elegans	De Man, 1888	Orange signaller crab	Not Listed	NE
Varunidae	Utica	borneensis	De Man, 1895		Not Listed	NE
Varunidae	Varuna	yui	Hwang & Takeda, 1986	Sundaic paddler crab; Paddler crab	Not Listed	NE
Hymenosomatidae	Neorhynchoplax	venusta	Ng, 2015		Not Listed	EN