Subphylum: Crustacea

Class: Malacostraca

Order: Decapoda

Crayfish, crabs, lobsters, prawns, and shrimp

Kingdom: Animalia, Phylum: Arthropoda

Antennule

Antenna

Claw

(cheliped)

(pereopod 1)

Eye

Walking leg (pereopod 3)

Shell

Setae (like hair)

Walking leg (pereopod 2)

Hermit crab Sand crab Claw

(cheliped)

(pereopod 1)

Walking leg (pereopod 2)

Walking leg (pereopod 3)

Walking leg (pereopod 4)

Swimming leg (pereopod 5) Image source: pir.sa.gov.au

Carapace

Propodus

Carpus

Merus

Dactyl (movable)

Antenna

Eye

Stridulating hermit crab

Strigopagurus strigimanus

Decorator crab or seaweed

bear crab Notomithrax ursus

Smooth seaweed crab

Naxia aurita

Purple mottled shore crab

Cyclograpsus granulosus

Velvet crab

Nectocarcinus tuberculosus

Hairy stone crab

Lomis hirta

Great spider crab

Leptomithrax gaimardii

Spotted shore crab

Paragrapsus gaimardii Rough Rock Crab

Nectocarcinus integrifrons