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Kingdom: Animalia (Animal)
Phylum/Division: Arthropoda (arthropods)
Subphylum/Subdivision: Crustacea (crustaceans)
Class: Malacostraca
Subclass: Eumalacostraca
Order: Decapoda (crabs, crayfishes, lobsters, prawns, shrimp)
Suborder: Pleocyemata
Infraorder: Brachyura
Family: Majidae (spider crabs)
Genus: Pugettia
Species: Pugettia producta (northern kelp crab)

 

 

Family: Cancridae (rock crabs)
Genus: Cancer
Species: Cancer magister (dungeness crab)

 

 

 

Species: Cancer productus (red rock crab)

 

 

 

 

 

 

 

Family: Gecarcinidae (land crabs)
Genus: Gecarcinus
Species: Gecarcinus ruricola (purple land crab)

 

Species: Gecarcinus lateralis (blackback land crab)

 

Family: Varunidae
Genus: Hemigrapsus
Species: Hemigrapsus nudus (purple shore crab)

 

 

Genus: Hemigrapsus
Species: Hemigrapsus oregonensis (yellow shore crab, hairy shore crab)

 

 

 

 

Family: Ocypodidae (fiddler crabs, ghost crabs)
Genus: Uca
Species: Uca arcuata (Fiddler crab)

 

 

Genus: Ocypode (ghost crabs)
Species: Ocypode cordimanus (smooth-handed ghost crab)

 

Family: Grapsidae (marsh crabs, shore crabs, talon crabs)
Genus: Grapsus
Species: Grapsus albolineatus (mottled lightfoot crab)

 

Infraorder: Anomura
Family: Coenobitidae (land hermit crabs)
Genus: Coenobita
Species: Coenobita clypeatus (land hermit)

 

Family: Paguridae (right-handed hermit crabs)
Genus: Pagurus
Species: Pagurus granosimanus (grainyhand hermit)

 

 

Class: Maxillopoda
Subclass: Thecostraca
Infraclass: Cirripedia (barnacles)
Order: Pedunculata
Suborder: Scalpellomorpha
Family: Scalpellidae
Genus: Pollicipes
Species: Pollicipes polymerus (Goose Barnacle or Goose Neck Barnacle)

 

 

 

Order: Sessilia (sessile barnacles)
Suborder: Balanomorpha (acorn barnacles)
Superfamily: Balanoidea
Family: Archaeobalanidae
Genus: Semibalanus
Species: Semibalanus cariosus (thatched barnacle)