Crabs – Alphabetical Index By Genus and Species (45):

Aethra scutata, Walking Rock Crab
Amphithrax armatus, Harbor Spider Crab
Aniculus elegans, Elegant Hermit Crab
Calappa convexa, Shamed-face Box Crab
Calcinus californiensis, Red-leg Hermit Crab 
Calcinus tibicen, Orange Claw Hermit Crab
Calappa saussurei, Small Arched Box Crab
Callinectes arcuatus, Cuata Swim Crab
Callinectes bellicosus, Green Crab
Cancer johngarthi, Northern Lemon Rock Crab
Cancer productus, Red Rock Crab
Cardisoma crassum, Mouthless Land Crab
Clibanarius tricolor, Blue-leg Hermit Crab
Cronius ruber, Red Swim Crab
Cryptosoma bairdii, Shame-faced Heart Box Crab
Dardanus sinistripes, Left-clawed Hermit Crab
Emerita analoga, Coldwater Mole Crab
Eriphia squamata, Lumpy Claw Crab
Euphylax robustus, Robust Swim Crab
Gecarcinus quandratus, Halloween Crab
Grapsus grapsus, Sally Lightfoot Crab
Hemigrapsus oregonensis, Yellow Shore Crab
Hemigrapsus nudus, Purple Shore Crab
Hepatus lineatus, Spotted Box Crab
Herbstia camptacantha, Flat Spider Crab
Hippa pacifica, Pacific Mole Crab
Hypoconcha lowei, Shell Crab
Libinia mexicana, Mexican Spider Crab
Limulus polyphemus, American Horseshoe Crab
Maiopsis panamensis, Panamic Spider Crab
Mesorhoea belli, Baja Elbow Crab
Mithrax armatus, Harbor Spider Crab
Ocypode occidentalis, Ghost Crab
Ocypode quadrata, Atlantic Ghost Crab
Pachygrapsus crassipes, Striped Shore Crab
Pachygrapsus transversus, Mottled Shore Crab
Pelia tunida, Dwarf Teardrop Crab
Persephona subovata, Purse Globe Crab
Petrochirus californiensis, Big Claw Purple Hermit Crab
Platymera gaudichaudii, Armed Box Crab
Pugettia producta, Northern Kelp Crab
Raninoides Species A, Deepwater Frog Crab
Stenocionops angustus, Inflated Spider Crab
Stenorhynchus debilus, Pacific Arrow Crab
Taliepus nuttallii, Southern Kelp Crab
Trizopagurus magnificus, Magnificent  Hermit Crab