### animal | arthropod | decapod | crab:

Mangrove crab
* Most mangrove crabs reach adulthood.
* Some mangrove crabs develop behavior
  - social behavior
* share habitats.

Mud crab
* Most mud crabs belong to genus.
* Most mud crabs display different movement patterns
* Most mud crabs inhabit mangrove areas
  - shelter areas
  - reach size
  - seek habitats
* inhabit areas
* show responses
  - strong responses

Older crab
* molt less frequently but require the same care
  - than younger ones
* tend to burrow farther from water.

Pea crab
* Most pea crabs feed on detrituses.
* are very small in size.

Red crab
* Most red crabs prefer rocky substrate
  - survive in presence
* Some red crabs feed on barnacles.
* Some red crabs have abdominal flaps
  - prefer habitats
  - stay in burrows
* are native to Christmas Island, Australia.
* eat what they can, eg.
* live alone in dirt burrow s, or deep rock crevices.
* release their eggs during mild or low tides, coinciding with the waning moon.

Red king crab
* eat food.
* have tails.
* live in shallow water

Sand crab
* are common as well
  - located in beachs
* scurry into holes.

### animal | arthropod | decapod | crab:

Shore crab
* are a nocturnal predator which means it hunts at night
  - also easy to identify and sex
  - relatively easy to find
  - scavengers, using their claws to tear apart dead fishes and rotting seaweed
* hide under rocks and seaweed at low tide.
* live on beaches and rocky shores
  - They are normally found in the North Atlantic or the Baltic Sea but are beginning to live in many other areas of the world. Shore crabs live on beaches and rocky shores.
  * are a nocturnal predator which means it hunts at night. They eat small crustaceans, molluscs, worms and some fish

Small crab
* Some small crabs eat crabs.
* are probably the most important food of the scorpionfish.
* molt frequently with molt frequency decreasing as carapace width increases.
* take anywhere from two to four days and large crabs a week to two weeks.

Snow crab
* Most snow crab is consumed in restaurants, a sector vulnerable to economic fluctuations.
* Some snow crabs have years.

Spider crab
* are crabs
  - experts in camouflage
  - harmless, lethargic creatures that eat sea worms, dead fish, detritis and algae
  - known for having long, spindly legs
  - tolerant of polluted waters and eutrophic, or low-oxygen, environments
* come inshore to breed as well.
* feature spines.
* get their name from their likeness to a spider.

Sponge crab
* avoid predators.
* carry sponges to camouflage themselves.

Stone crab
* are crabs
  - less common
  - part of stone crabs
* differ from blue crabs in that only the over-sized claws are harvested.
* eat shrimp, oysters, clams, or just about anything else they can get their claws on.
* have small bodies and only the claws are eaten.
* inhabit bays and estuaries where they hide under rocks and shell fragments.
* live in holes which they hollow in the marsh mud.

Swimmer crab
* Most swimmer crabs begin life.
* Some swimmer crabs belong to families.

### animal | arthropod | decapod | crab | swimming crab:

Calico crab
* become effective for striped bass in the surf.
* swimming crab

### animal | arthropod | decapod | crab:

True crab
* appear in the fossil record in the Lower Jurassic.
* have antennae or feelers on their heads and jaws
  - five pairs of legs including the claws
  - only one pair of claws
  - two sets of antennae, a pair of jaws, one set of claws, and ten legs
+ Crab, Evolution
  * True crabs appear in the fossil record in the Lower Jurassic. They are part of the 'Mesozoic marine revolution', in which a number of sea-floor predators evolved. Vermeij G.J. 1977. The Mesozoic marine revolution. Paleobiology' '3', 135.

Whole crab
* are approximately ten centimeters across.
* turn bright orange-red when cooked