Part I. Alphabetical Index by Family (17) – Common Names (45):
Arrow Crabs of the Inachidae Family (1):
Pacific Arrow Crab, Stenorhynchus debilus
Box Crabs of the Aethridae Family (1):
Spotted Box Crab, Hepatus lineatus
Box Crabs of the Calappidae Family (5):
Armed Box Crab, Platymera gaudichaudii
Shame-face Box Crab, Calappa convexa
Shamed-faced Heart Box Crab, Cryptosoma bairdii
Small Arched Box Crab, Calappa saussurei
Decorator Crab of the Dromiidae Family (1)
Shell Crab, Hypoconcha lowei
Elbow Crabs of the Parthenopidae Family (1):
Baja Elbow Crab, Mesorhoea belli
Frog Crabs of the Raninidae Family (1):
Deepwater Frog Crab, Raninoides Species A
Gorilla Crabs, Mud Crabs and Pebble Crabs of the Xanthidae Family (1):
Lumpy Claw Crab, Eriphia squamata
Ghost and Fiddler Crabs of the Octopodidae Family (2):
Atlantic Ghost Crab, Ocypode quadrata
Ghost Crab, Ocypode occidentalis
Hermit Crabs of the Diogenidae Family (7):
Big Claw Purple Hermit Crab, Petrochirus californiensis
Blue-leg Hermit Crab, Clibanarius tricolor
Elegant Hermit Crab, Aniculus elegans
Left-clawed Hermit Crab, Dardanus sinistripes
Magnificent Hermit Crab, Trizopagurus magnificus
Orange Claw Hermit Crab, Calcinus tibicen
Red-leg Hermit Crab, Calcinus californiensis
Horseshoe Crabs of the Limulidae Family (1):
American Horseshoe Crab, Limulus polyphemus
Kelp and Spider Crabs of the Epialthidae Family (3):
Dwarf Teardrop Crab, Pelia tunida
Northern Kelp Crab, Pugettia producta
Southern Kelp Crab, Taliepus nuttallii
Land and Terrestrial Crabs of the Gecarcinidae Family (2)
Halloween Crab, Gecarcinus quadratus
Mouthless Land Crab, Cardisoma crassum
Mole Crabs of the Hippidae Family (2)
Coldwater Mole Crab, Emerita analoga
Pacific Mole Crab, Hippa pacifica
Purse Crabs of the Leucosiidae Family (1)
Globe Purse Crab, Persephona subovata
Rock Crabs of the Cancridae Family (2)
Northern Lemon Rock Crab, Cancer johngarthi
Red Rock Crab, Cancer productus
Shore Crabs of the Grapsidae Family (5):
Mottled Shore Crab, Pachygrapsus transversus
Purple Shore Crab, Hemigrapsus nudus
Sally Lightfoot Crab, Grapsus grapsus
Striped Shore Crab, Pachygrapsus crassipes
Yellow Shore Crab, Hemigrapsus oregonensis
Spider Crabs of the Majidae Family (5):
Flat Spider Crab, Herbstia camptacantha
Harbor Spider Crab, Mithrax armatus
Inflated Spider Crab, Stenocionops angustus
Mexican Spider Crab, Libinia mexicana
Panamic Spider Crab, Maiopsis panamensis
Swimming Crabs of the Portuinidae Family (4):
Cuata Swim Crab, Callinectes arcuatus
Green Crab, Callinectes bellicosus
Red Swim Crab, Cronius ruber
Robust Swim Crab, Euphylax robustus
True Crabs of the Brachyuran Family (1):
Walking Rock Crab, Aethra scutata
Part II. Alphabetical Index by Family (17) – Scientific Names (44)
Aethridae Family of Box Crabs (1):
Spotted Box Crab, Hepatus lineatus
Brachyuran Family of True Crabs (1):
Walking Rock Crab, Aethra scutata
Calappidae Family of Box Crabs (5):
Armed Box Crab, Platymera gaudichaudii
Shamed-face Box Crab, Calappa convexa
Shamed-faced Heart Box Crab, Cryptosoma bairdii
Small Arched Box Crab, Calappa saussurei
Cancridae Family of Rock Crabs (2)
Northern Lemon Rock Crab, Cancer johngarthi
Red Rock Crab, Cancer productus
Diogenidae Family of Hermit Crabs (7):
Big Claw Purple Hermit Crab, Petrochirus californiensis
Blue-leg Hermit Crab, Clibanarius tricolor
Elegant Hermit Crab, Aniculus elegans
Left-clawed Hermit Crab, Dardanus sinistripes
Magnificent Hermit Crab, Trizopagurus magnificus
Orange Claw Hermit Crab, Calcinus tibicen
Red-leg Hermit Crab, Calcinus californiensis
Dromiidae Family of Decorator Crabs (1)
Shell Crab, Hypoconcha lowei
Epialtidae Family of Kelp and Spider Crabs (3):
Dwarf Teardrop Crab, Pelia tunida
Northern Kelp Crab, Pugettia producta
Southern Kelp Crab, Taliepus nuttallii
Gecarcinidae Family of Land and Terrestrial Crabs (2)
Halloween Crab, Gecarcinus quadratus
Mouthless Land Crab, Cardisoma crassum
Grapsidae Family of Shore Crabs (5):
Mottled Shore Crab, Pachygrapsus transversus
Purple Shore Crab, Hemigrapsus nudus
Sally Lightfoot Crab, Grapsus grapsus
Striped Shore Crab, Pachygrapsus crassipes
Yellow Shore Crab, Hemigrapsus oregonensis
Hippidae Family of Mole Crabs (2)
Coldwater Mole Crab, Emerita analoga
Pacific Mole Crab, Hippa pacifica
Inachidae Family of Arrow Crabs (1):
Pacific Arrow Crab, Stenorhynchus debilus
Leucosiidae Family of Purse Crabs (1)
Globe Purse Crab, Persephona subovata
Limulidae Family of Horseshoe Crabs (1):
American Horseshoe Crab, Limulus polyphemus
Majidae Family of Spider Crabs (5):
Flat Spider Crab, Herbstia camptacantha
Harbor Spider Crab, Mithrax armatus
Inflated Spider Crab, Stenocionops angustus
Mexican Spider Crab, Libinia mexicana
Panamic Spider Crab, Maiopsis panamensis
Octopodidae Family of Ghost and Fiddler Crabs (2):
Atlantic Ghost Crab, Ocypode quadrata
Ghost Crab, Ocypode occidentalis
Parthenopidae Family of Elbow Crabs (1):
Baja Elbow Crab, Mesorhoea belli
Portuinidae Family of Swimming Crabs (4):
Cuata Swim Crab, Callinectes arcuatus
Green Crab, Callinectes bellicosus
Red Swim Crab, Cronius ruber
Robust Swim Crab, Euphylax robustus
Raninidae Family of Frog Crabs (1):
Deepwater Frog Crab, Raninoides Species A
Xanthidae Family of Gorilla Crabs, Mud Crabs and Pebble Crabs (1):
Lumpy Claw Crab, Eriphia squamata