Crabs are arthropods which belong to the Subphylum Crustacea and the Order Decapoda. They are found in a variety of different marine and freshwater habitats including, estuaries, the rocky intertidal, soft sediment shores, mangroves, rivers, subtidal benthos, kelp beds and the deep sea. They typically have five pairs of thoracic limbs, developed for walking, grasping, or swimming. One of these pairs is the chelae or the claws. Crabs are omnivores, feeding on algae, mollusks, worms, other crustaceans and detritus. Many of the crabs in NEMESIS have been introduced through accidental transport in the ballast water of commercial ships or aquaculture shipments. The impacts of exotic crabs are varied, but some species may compete with native crustacean species, prey on native marine invertebrates, or cause environmental damage through burrowing into natural waterways.

Species List

Callinectes bocourti
Callinectes sapidus
Carcinus maenas
Charybdis hellerii
Eriocheir japonica
Eriocheir sinensis
Hemigrapsus sanguineus
Metacarcinus magister
Metopograpsus oceanicus
Petrolisthes armatus
Platychirograpsus spectabilis
Rhithropanopeus harrisii
Scylla serrata
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