Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
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Order Decapoda - Crabs, Crayfishes, Lobsters, Prawns, and Shrimp

Phylum Arthropoda - Arthropods
Subphylum Crustacea - Crustaceans
Class Malacostraca - Malacostracans
Superorder Eucarida - Eucarida (Crabs, Crayfish, Shrimp, etc.)
Order Decapoda - Crabs, Crayfishes, Lobsters, Prawns, and Shrimp

Infraorder Anomura - Hermit Crabs and Mole Crabs
Superfamily Galatheoidea
Family Munididae - Squat Lobsters
Genus Pleuroncodes
Species planipes - Red Crab
Family Porcellanidae - Porcelain Crabs
Genus Euceramus
Species praelongus - Euceramus praelongus
Genus Petrolisthes
Species eriomerus - Petrolisthes eriomerus
Species armatus - Green Porcelain Crab
Genus Polyonyx
Species gibbesi - Polyonyx gibbesi
Genus Pachycheles
Species rudis - Pachycheles rudis
Superfamily Hippoidea
Family Hippidae - Mole Crabs
Genus Emerita
Species analoga - Pacific Mole Crab
Species talpoida - Atlantic Mole Crab
Superfamily Paguroidea - Hermit Crabs
Family Diogenidae
Genus Petrochirus
Species diogenes - Petrochirus diogenes
Genus Clibanarius
Species vittatus - Thinstripe Hermit Crab
Family Lithodidae
Genus Cryptolithodes
Species sitchensis - Cryptolithodes sitchensis
Genus Paralithodes
Species rathbuni - Spiny King Crab
Family Paguridae
Genus Pagurus
Species acadianus - Pagurus acadianus
Species annulipes - Pagurus annulipes
Species grainosinanus - Grainyhand Hermit Crab
Species hirsutiusculus - Hairy Hermit Crab
Species longicarpus - Long-Clawed Hermit Crab
Species pollicaris - Flat-clawed Hermit Crab
Species samuelis - Blueband Hermit Crab
Family Coenobitidae
Genus Coenobita
Species clypeatus - Caribbean hermit crab
Infraorder Astacidea - Crayfishes and Lobsters
Superfamily Astacoidea - Crayfish
Family Astacidae
Genus Pacifastacus
Species leniusculus - Signal Crayfish
Species gambelli - Pacifastacus gambelli
Family Cambaridae
Genus Cambarus
No Taxon Subgenus Cambarus
Species bartonii - Cambarus bartonii
Subspecies bartonii - Cambarus bartonii bartonii
No Taxon bartonii complex
No Taxon Subgenus Hiaticambarus
Species speciosus - Beautiful Crayfish
No Taxon Subgenus Jugicambarus
Species dubius - Cambarus dubius
Species asperimanus - Cambarus asperimanus
Species tartarus - Oklahoma cave crayfish
No Taxon Subgenus Lacunicambarus
Species diogenes - Devil Crayfish
No Taxon Subgenus Puncticambarus
Species robustus - Robust Crayfish
No Taxon Subgenus Tubericambarus
Species polychromatus - Cambarus polychromatus
Genus Orconectes
No Taxon Subgenus Procericambarus
Species rusticus - Rusty Crayfish
No Taxon Subgenus Faxonius
Species limosus - Spiny-Cheek Crayfish
Species obscurus - Allegheny Crayfish
No Taxon Subgenus Cockerinus
Species propinquus - Northern Clearwater Crayfish
Species erichsonianus - Reticulate Crayfish
No Taxon Subgenus Orconectes
Species maletae - Orconectes maletae
No Taxon Subgenus Trisellescens
Species validus - Powerful Crayfish
Species immunis - Calico Crayfish
No Taxon Subgenus Gremicambarus
Species virilis - Virile Crayfish
Genus Procambarus
No Taxon Subgenus Leconticambarus
Species alleni - Florida Crayfish
No Taxon Subgenus Ortmannicus
Species fallax - Slough Crayfish
Species acutus - White River Crayfish
Subspecies acutus - White River Crayfish
No Taxon Subgenus Scapulicambarus
Species clarkii - Red Swamp Crayfish
Genus Faxonius
Species luteus - Faxonius luteus
Species palmeri - Faxonius palmeri
Family Nephropidae
Genus Homarus
Species americanus - American Lobster
Infraorder Axiidea
Family Callianassidae - Ghost Shrimp
Genus Neotrypaea
Infraorder Brachyura - True Crabs
Family Calappidae - Box crabs
Genus Calappa
Species flammea - Flame-streaked Box Crab
Family Cancridae - Rock Crabs
Genus Cancer
Species borealis - Cancer borealis
Species gracilis - Slender Crab
Species irroratus - Atlantic Rock Crab
Species productus - Red Rock Crab
Genus Metacarcinus
Species magister - Dungeness Crab
Family Epialtidae - Kelp Crabs and Spider Crabs
Genus Libinia - Spider Crabs
Species dubia - Libinia dubia
Species emarginata - Portly Spider Crab
Genus Loxorhynchus
Species crispatus - Masking Crab
Species grandis - Sheep crab
Genus Pugettia
Species producta - Northern Kelp Crab
Genus Taliepus
Species nuttallii - Southern Kelp Crab
Family Gecarcinidae - Land Crabs
Genus Cardisoma
Species guanhumi - Blue Land Crab
Family Grapsidae - Marsh Crabs, Shore Crabs, and Talon Crabs
Genus Pachygrapsus
Species transversus - Mottled Shore Crab
Species crassipes - Striped Shore Crab
Genus Hemigrapsus
Species sanguineus - Japanese Shore Crab
Species oregonensis - Green Shore Crab
Species nudus - Purple Shore Crab
Genus Grapsus
Species grapsus - Sally Lightfoot Crab
Family Hepatidae
Genus Hepatus
Species epheliticus - Calico Crab
Family Inachidae
Genus Stenorhynchus
Species seticornis - Yellowline Arrow Crab
Family Leucosiidae
Genus Persephona
Species mediterranea - Mottled Purse Crab
Genus Randallia
Species ornata - Globose Sand Crab
Family Ocypodidae - Fiddler Crabs and Ghost Crabs
Genus Uca - Fiddler Crabs
Species crenulata - Mexican Fiddler Crab
Species longisignalis - Longwave Gulf Fiddler
Species minax - Red-jointed Fiddler Crab
Species pugilator - Atlantic Sand Fiddler Crab
Species pugnax - Atlantic Marsh Fiddler Crab
Species thayeri - Atlantic Mangrove Fiddler Crab
Genus Ocypode - Ghost Crabs
Species quadrata - Atlantic Ghost Crab
Family Panopeidae
Genus Dyspanopeus
Species sayi - Say's Mud Crab
Genus Lophopanopeus
Species bellus - Lophopanopeus bellus
Genus Panopeus
Species lacustris - Knot-fingered mud crab
Family Pilumnidae
Genus Pilumnus
Species sayi - Spineback Hairy Crab
Family Pinnotheridae - Pea Crabs
Genus Pinnixa
Species chaetopterana - Tube Pea Crab
Genus Dissodactylus
Species mellitae - Sand-dollar Pea Crab
Family Portunidae - Swimming Crabs
Genus Achelous
Species spinimanus - Achelous spinimanus
Genus Arenaeus
Species cribrarius - Speckled Swimming Crab
Genus Callinectes
Species ornatus - Callinectes ornatus
Species sapidus - Atlantic Blue Crab
Genus Carcinus
Species maenas - Green Crab
Genus Ovalipes
Species ocellatus - Lady Crab
Genus Portunus
Species sayi - Portunus sayi
Family Sesarmidae
Genus Aratus
Species pisonii - Mangrove Tree Crab
Genus Armases
Species cinereum - Squareback Marsh Crab
Family Ucididae
Genus Ucides
Species cordatus - Mangrove crab
Family Xanthidae - Mud Crabs
Genus Menippe
Species mercenaria - Menippe mercenaria
Infraorder Stenopodidea
Family Stenopodidae
Genus Stenopus
Species hispidus - Banded Coral Shrimp
Infraorder Caridea - Caridean shrimps
Family Crangonidae
Genus Crangon
Species septemspinosa - Crangon septemspinosa
Family Hippolytidae
Genus Lysmata
Species californica - Red Rock Shrimp
Genus Latreutes
Species fucorum - Latreutes fucorum
Family Palaemonidae
Genus Palaemon
Species elegans - Palaemon elegans
Species intermedius - Palaemon intermedius
Species pugio - Palaemon pugio
Species vulgaris - Palaemon vulgaris
Family Pandalidae
Genus Pandalus
Species platyceros - California Spot Prawn