Discover great deals on the many hard to find and one of a kind items available only on ebay!

This site contains sponsored affiliate links.

Crab

The term crab is often applied to several different groups of short (nose to tail) decapods with thick exoskeletons, but only members of the Brachyura are true crabs; other taxa, such as hermit crabs, porcelain crabs, king crabs, and horseshoe crabs are, despite superficial similarities, not crabs at all. more...

HomeHome
AmphibianAmphibian
ArthropodArthropod
AntAnt
AphidAphid
BedbugBedbug
BeeBee
BeetleBeetle
Black WidowBlack Widow
BumblebeeBumblebee
CentipedeCentipede
CrabCrab
CricketCricket
Daddy LonglegsDaddy Longlegs
DragonflyDragonfly
EarthwormEarthworm
EarwigEarwig
FireflyFirefly
GlowwormGlowworm
GnatGnat
GrasshopperGrasshopper
Hermit CrabHermit Crab
HornetHornet
KatydidKatydid
LadybugLadybug
LiceLice
LobsterLobster
LocustLocust
MayflyMayfly
MillipedeMillipede
MosquitoMosquito
MothMoth
Praying MantisPraying Mantis
ScarabScarab
ScorpionScorpion
Sea MonkeySea Monkey
ShrimpShrimp
SpiderSpider
TarantulaTarantula
TickTick
TrilobiteTrilobite
WaspWasp
Wolf SpiderWolf Spider
YellowjacketYellowjacket
BirdBird
CatCat
DinosaurDinosaur
DogDog
FishFish
MammalMammal
MythologicalMythological
ReptileReptile


Hermit crabs, king crabs and porcelain crabs belong to the Anomala and can be distinguished from true crabs by counting the legs - in Anomala, the last pair of pereiopods (walking legs) is hidden inside the carapace and so only four pairs are visible (counting the claws), whereas uninjured true crabs always have five visible pairs.

True crabs

True crabs are crustaceans in the infraorder Brachyura, in the order Decapoda. They have five pairs of walking legs (the first of which is modified into a pair of claws or chelae) and typically a flattened shell. In all but a few crabs (for example, Raninoida), the abdomen is folded under the cephalothorax. The form of the abdomen usually reveals the sex of the crab - males have a narrow abdomen, while females have a much wider abdomen, under which they carry their eggs. Crabs are a very diverse group, mostly found in salt water, but with some groups living in freshwater or on land. Although famed for their tendency to walk sideways, crabs are in fact able to walk in any direction. Classification within the crabs is traditionally based on the position of the gonopores: whether they are found on the legs or on the thorax. In the two "primitive" sections (sometimes called collectively the "Podotremata"), the gonopores are found on the legs (as in all other decapods); in the Heterotremata, the male gonopores are on the legs, and the female gonopores are on the sternum; in the Thoracotremata, the gonopores are on the sternum in both males and females.

Sexual dimorphism

Most crabs show clear sexual dimorphism and so can be easily sexed. The abdomen, which is held recurved under the thorax, is narrow in males. In females, however, the abdomen is considerably wider, and retains a greater number of pleopods. This relates to the carrying of the fertilised eggs by the female crabs (as seen in all pleocyemates). In those species in which no such dimorphism is found, the position of the gonopores must be used instead. In females, these are on the third pereiopod, or nearby on the sternum in higher crabs; in males, the gonopores are at the base of the fifth pereiopods or, in higher crabs, on the sternum nearby.

Other animals

A number of animals with a similar shape are commonly called crabs, including the crab louse (an insect) and the horseshoe crab (in the class Merostomata). The crab louse is the origin of the slang term "crabs" for an infestation of pubic lice.

Superfamilies

  • Bellioidea
  • Bythograeoidea
  • Calappoidea
  • Cancroidea
  • Cryptochiroidea
  • Cyclodorippoidea
  • Dorippoidea
  • Dromioidea
  • Gecarcinucoidea
  • Grapsoidea
  • Homolodromioidea
  • Homoloidea
  • Hymenosomatoidea
  • Leucosioidea
  • Majoidea
  • Ocypodoidea
  • Parthenopoidea
  • Pinnotheroidea
  • Portunoidea
  • Potamoidea
  • Pseudothelphuspoidea
  • Raninoidea
  • Retroplumoidea
  • Xanthoidea

Read more at Wikipedia.org


[List your site here Free!]

Trilobite Itagnostus Specimen Fossil Mineral Sea Life Wheelr Shale w/ Id CardTrilobite Itagnostus Specimen Fossil Mineral Sea Life Wheelr Shale w/ Id Card $5.99 Rare Complete Spiny Charybdis (Fossilized Crab) - IndonesiaRare Complete Spiny Charybdis (Fossilized Crab) - Indonesia $570.00
Bryozoa Fossil Coral Reef Ordovician Sea Life Specimen Kentucky w/ Id cardBryozoa Fossil Coral Reef Ordovician Sea Life Specimen Kentucky w/ Id card $4.99 Xiphosurida Arthropod Fossil - Horseshoe Crab Ancestor - Zagora, MoroccoXiphosurida Arthropod Fossil - Horseshoe Crab Ancestor - Zagora, Morocco $400.00
Horseshoe Crab 7+" Taxidermy display collectible specimen craft nauticalHorseshoe Crab 7+" Taxidermy display collectible specimen craft nautical $26.66 Hermit Crab Huts, 5X3 Inches, Arthropod'S Coconut Hide, Spacious Coco Tunnel, UsHermit Crab Huts, 5X3 Inches, Arthropod'S Coconut Hide, Spacious Coco Tunnel, Us $10.41
Flg Prt Live Crabs Poly Garden largeFlg Prt Live Crabs Poly Garden large $25.61 Horseshoe Crab 7-9" Taxidermy display collectible specimen nautical craftHorseshoe Crab 7-9" Taxidermy display collectible specimen nautical craft $29.99
Coconut Crab, Blue, Realistic Toy Figure, Model, Replica, 4" Ch304 Bb129Coconut Crab, Blue, Realistic Toy Figure, Model, Replica, 4" Ch304 Bb129 $8.79 Marrella Arthropod Lace crab Rubber Realistic Toy Figure Gift 3" Ch491Bb154Marrella Arthropod Lace crab Rubber Realistic Toy Figure Gift 3" Ch491Bb154 $7.59
Coconut Crab, Realistic Toy Figure, Model, Replica, Kids, Gift, 4" Ch196 Bb117Coconut Crab, Realistic Toy Figure, Model, Replica, Kids, Gift, 4" Ch196 Bb117 $9.89 Acastoides Trilobite Fossil Sea Life Mineral Specimen Devonian MoroccoAcastoides Trilobite Fossil Sea Life Mineral Specimen Devonian Morocco $14.99
Trilobite Specimen Fossil Mineral Kainops Devonian Sea Life Oklahoma RareTrilobite Specimen Fossil Mineral Kainops Devonian Sea Life Oklahoma Rare $89.99 Horseshoe crab 5-7" Horseshoe Crab Ocean display collectible specimenHorseshoe crab 5-7" Horseshoe Crab Ocean display collectible specimen $25.99
Hermit Crab with Terrarium #62 Littlest Pet Shop Portable Pets Lps 2005 CompleteHermit Crab with Terrarium #62 Littlest Pet Shop Portable Pets Lps 2005 Complete $18.99 Fossil Crab From Indonesia With Claw Preservation - Could Be Prepped MoreFossil Crab From Indonesia With Claw Preservation - Could Be Prepped More $175.00
New ListingHermit Crab Coco Hut with Ladder, Hamster & Hermit Crab Hideout, Coconut Hide foNew ListingHermit Crab Coco Hut with Ladder, Hamster & Hermit Crab Hideout, Coconut Hide fo $17.40 Fossil Crab From Indonesia In Matrix Crustacean Fossil Indonesian MioceneFossil Crab From Indonesia In Matrix Crustacean Fossil Indonesian Miocene $130.00
Large Elrathia Trilobite In Matrix Specimen Prehistoric Fossil Mineral UtahLarge Elrathia Trilobite In Matrix Specimen Prehistoric Fossil Mineral Utah $23.99 hsc13b Damaged Horseshoe Crab 7-9" Taxidermy display collectible specimen crafthsc13b Damaged Horseshoe Crab 7-9" Taxidermy display collectible specimen craft $27.99
Fossil Crab From Indonesia In Matrix Crustacean FossilFossil Crab From Indonesia In Matrix Crustacean Fossil $160.00 SunGrow Hermit Crab Huts, 5x3 Inches, Arthropod's Coconut BrownSunGrow Hermit Crab Huts, 5x3 Inches, Arthropod's Coconut Brown $20.00
Very Rare horseshoe crab armour fossil arthropod when molting not Mazon CreekVery Rare horseshoe crab armour fossil arthropod when molting not Mazon Creek $66.00 Horseshoe Crab Collectible Glass dome display oddities Curiosity Taxidermy giftHorseshoe Crab Collectible Glass dome display oddities Curiosity Taxidermy gift $59.99
Brody - Japanese Spider Crabs Nature's Biggest Arthropod - New Hardb - S9000zBrody - Japanese Spider Crabs Nature's Biggest Arthropod - New Hardb - S9000z $44.64 Huge Travertine Crab Fossil, 15cm by 16cm Fossil Travertine Crab PotamonHuge Travertine Crab Fossil, 15cm by 16cm Fossil Travertine Crab Potamon $260.00
Funny Crab Arthropod Animal | 4' X 4' Round Decorative MagnetFunny Crab Arthropod Animal | 4' X 4' Round Decorative Magnet $5.80 Amazing Ammonites! Arthropod, Crustacean Crab Fossil From Java, Indonesia, 33MmAmazing Ammonites! Arthropod, Crustacean Crab Fossil From Java, Indonesia, 33Mm $19.98
New CollectA 88905 Prehistoric Horseshoe Crab Arthropod Model age of DinosaurNew CollectA 88905 Prehistoric Horseshoe Crab Arthropod Model age of Dinosaur $9.50 Funny Crab Arthropod Animal 4' X 4' Square Wooden CoasterFunny Crab Arthropod Animal 4' X 4' Square Wooden Coaster $6.30
Robert Stanley Crab Arthropod Sea Creature Glass OrnamentRobert Stanley Crab Arthropod Sea Creature Glass Ornament $15.00 2018 Coconut Crab - Titanium Coin in Capsule+Coa British Indian Ocean Territory2018 Coconut Crab - Titanium Coin in Capsule+Coa British Indian Ocean Territory $59.00
Real Air Dried Crab Body CarapacesReal Air Dried Crab Body Carapaces $53.49 Hsc30 Three (3) damaged horseshoe crabs oddities curiosities display craftHsc30 Three (3) damaged horseshoe crabs oddities curiosities display craft $24.99
Smal Horshoe CrabSmal Horshoe Crab $11.00 Horseshoe Crab Arthropod Sealife Toy Model Figure by CollectA 88905 NewHorseshoe Crab Arthropod Sealife Toy Model Figure by CollectA 88905 New $15.50
Fresh Live Dungeness crab 15 Lb Package 10 PieceFresh Live Dungeness crab 15 Lb Package 10 Piece $350.00 Horseshoe Crab 4-5" One Only taxidermy display aquatic nautical Crafts specimenHorseshoe Crab 4-5" One Only taxidermy display aquatic nautical Crafts specimen $19.99
Japanese Spider Crabs: Nature's Biggest Arthropod by Walt Brody Paperback BookJapanese Spider Crabs: Nature's Biggest Arthropod by Walt Brody Paperback Book $21.97 Horseshoe Crab 12" Taxidermy display ocean aquatic nautical craft marineHorseshoe Crab 12" Taxidermy display ocean aquatic nautical craft marine $29.99
Vintage Brass Articulated Crab Ashtray Patina Mcm Solid Crustacean ArthropodVintage Brass Articulated Crab Ashtray Patina Mcm Solid Crustacean Arthropod $39.99 Double Charybdis Complete Fossil Crabs in Matrix, Miocene, Indonesia – 100%Double Charybdis Complete Fossil Crabs in Matrix, Miocene, Indonesia – 100% $1,060.50
Crab Fossil Slo County California Pliocene Miocene Cast In Monterey ShaleCrab Fossil Slo County California Pliocene Miocene Cast In Monterey Shale $44.50 Japanese Spider Crabs: Nature's Biggest Arthropod by Walt Brody Hardcover BookJapanese Spider Crabs: Nature's Biggest Arthropod by Walt Brody Hardcover Book $35.18
Fossils Replica Cambrian arthropod - Marella Splendens - Burgess ShaleFossils Replica Cambrian arthropod - Marella Splendens - Burgess Shale $32.76 Hermit Crab Starter Kit W/ Food Water Dishes Growth Shells Care Sheet & More NewHermit Crab Starter Kit W/ Food Water Dishes Growth Shells Care Sheet & More New $43.50
Robert Stanley Hermit Crab Blown Glass Jeweled Ornament 5.75 InchesRobert Stanley Hermit Crab Blown Glass Jeweled Ornament 5.75 Inches $18.00 Amazing Arthropod, Crustacean, Crab Fossil Matrix, From Java, Indonesia, 35MmAmazing Arthropod, Crustacean, Crab Fossil Matrix, From Java, Indonesia, 35Mm $29.48
Click to see more Crab items at www.ebay.com
Prices current as of last update, 02/18/25 3:41am.

Home Contact Resources Exchange Links eBay