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!]

hsc13 Horseshoe Crab 7-9" Taxidermy display collectible specimen nautical crafthsc13 Horseshoe Crab 7-9" Taxidermy display collectible specimen nautical craft $29.99 Fresh Live Dungeness crab 15 Lb Package 10 PieceFresh Live Dungeness crab 15 Lb Package 10 Piece $350.00
New CollectA 88905 Prehistoric Horseshoe Crab Arthropod Model age of DinosaurNew CollectA 88905 Prehistoric Horseshoe Crab Arthropod Model age of Dinosaur $10.09 Ikimono Encyclopedia Premium Coconut Crab pre-order limited JapanIkimono Encyclopedia Premium Coconut Crab pre-order limited Japan $207.00
Crab Fossil Slo County California Pliocene Miocene Cast In Monterey ShaleCrab Fossil Slo County California Pliocene Miocene Cast In Monterey Shale $79.00 Amazing Arthropod, Crustacean, Crab Fossil Matrix, From Java, Indonesia, 35MmAmazing Arthropod, Crustacean, Crab Fossil Matrix, From Java, Indonesia, 35Mm $33.88
Vintage Brass Articulated Crab Ashtray Patina Mcm Solid Crustacean ArthropodVintage Brass Articulated Crab Ashtray Patina Mcm Solid Crustacean Arthropod $39.99 Arthropoda, Crustacean Crab Fossil From Java Indonesia, 30MmArthropoda, Crustacean Crab Fossil From Java Indonesia, 30Mm $22.99
Fossil Crab From Indonesia In Matrix Crustacean FossilFossil Crab From Indonesia In Matrix Crustacean Fossil $160.00 New ListingAcastoides Trilobite Fossil Sea Life Mineral Specimen Devonian MoroccoNew ListingAcastoides Trilobite Fossil Sea Life Mineral Specimen Devonian Morocco $14.99
Hsc11 Horseshoe crab 5-7" Horseshoe Crab Ocean display collectible specimenHsc11 Horseshoe crab 5-7" Horseshoe Crab Ocean display collectible specimen $25.99 Funny Crab Arthropod Animal | 4' X 4' Round Decorative MagnetFunny Crab Arthropod Animal | 4' X 4' Round Decorative Magnet $5.80
hsc13b Damaged Horseshoe Crab 7-9" Taxidermy display collectible specimen crafthsc13b Damaged Horseshoe Crab 7-9" Taxidermy display collectible specimen craft $27.99 Hermit Crab Blown Glass Christmas Ornament Beach Ocean Theme Robert Stanley NewHermit Crab Blown Glass Christmas Ornament Beach Ocean Theme Robert Stanley New $17.99
Fossil Crab From Indonesia With Claw Preservation - Could Be Prepped MoreFossil Crab From Indonesia With Claw Preservation - Could Be Prepped More $175.00 Flg Prt Live Crabs Poly Garden largeFlg Prt Live Crabs Poly Garden large $25.61
hsc16 One Horseshoe Crab 4-5" Taxidermy display aquatic nautical One Only Craftshsc16 One Horseshoe Crab 4-5" Taxidermy display aquatic nautical One Only Crafts $17.99 Funny Crab Arthropod Animal 4' X 4' Square Wooden CoasterFunny Crab Arthropod Animal 4' X 4' Square Wooden Coaster $6.30
Coconut Crab, Blue, Realistic Toy Figure, Model, Replica, 4" Ch304 Bb129Coconut Crab, Blue, Realistic Toy Figure, Model, Replica, 4" Ch304 Bb129 $8.79 Itagnostus Trilobite In Matrix Specimen Prehistoric Fossil Mineral UtahItagnostus Trilobite In Matrix Specimen Prehistoric Fossil Mineral Utah $9.99
Very Rare Carboniferous Xiphosuran Horseshoe Crab Arthropod Fossil From The UkVery Rare Carboniferous Xiphosuran Horseshoe Crab Arthropod Fossil From The Uk $185.00 Travertine Crab Fossil From Turkey, 14cm by 12cm Fossil Travertine Crab PotamonTravertine Crab Fossil From Turkey, 14cm by 12cm Fossil Travertine Crab Potamon $250.00
Real Air Dried Crab Body CarapacesReal Air Dried Crab Body Carapaces $53.49 Robert Stanley Hermit Crab Ocean Beach Blown Glass Christmas Ornament NewRobert Stanley Hermit Crab Ocean Beach Blown Glass Christmas Ornament New $9.99
Huge Fossil Crab Indonesia Miocene Megalodon Age in Matrix Rare CrustaceanHuge Fossil Crab Indonesia Miocene Megalodon Age in Matrix Rare Crustacean $249.00 Hsc20 Damaged Real Horseshoe Crab shell Oddities Curiosities specimen 18+Hsc20 Damaged Real Horseshoe Crab shell Oddities Curiosities specimen 18+ $19.99
Fossils Replica Cambrian arthropod - Marella Splendens - Burgess ShaleFossils Replica Cambrian arthropod - Marella Splendens - Burgess Shale $33.93 Hsc30 Three (3) damaged horseshoe crabs oddities curiosities display craftHsc30 Three (3) damaged horseshoe crabs oddities curiosities display craft $24.99
Penn Plax Hermit Crab Kit Complete Habitat Crabs- Reptiles- Amphibians- SpidersPenn Plax Hermit Crab Kit Complete Habitat Crabs- Reptiles- Amphibians- Spiders $15.00 Japanese Spider Crabs: Nature's Biggest Arthropod by Walt Brody Hardcover BookJapanese Spider Crabs: Nature's Biggest Arthropod by Walt Brody Hardcover Book $34.13
Fossil Crab Charybdis Java indonesia ships from Wa state UsaFossil Crab Charybdis Java indonesia ships from Wa state Usa $90.00 Trilobite Specimen Fossil Mineral Kainops Devonian Sea Life Oklahoma RareTrilobite Specimen Fossil Mineral Kainops Devonian Sea Life Oklahoma Rare $51.99
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 Amazing Ammonite! Stegodon Molar Partial Tooth Fossil From Java, Indonesia, 80MmAmazing Ammonite! Stegodon Molar Partial Tooth Fossil From Java, Indonesia, 80Mm $50.88
hsc19 Horseshoe Crab 7+" Taxidermy display collectible specimen craft nauticalhsc19 Horseshoe Crab 7+" Taxidermy display collectible specimen craft nautical $26.66 Amazing Ammonite! Crocodile Aligator Tooth Fossil, From Java, Indonesia, 37MmAmazing Ammonite! Crocodile Aligator Tooth Fossil, From Java, Indonesia, 37Mm $19.98
Amazing Ammonite! Arthropod, Crustacean Crab Fossil, From Java, Indonesia, 33MmAmazing Ammonite! Arthropod, Crustacean Crab Fossil, From Java, Indonesia, 33Mm $19.98 Japanese Spider Crabs: Nature's Biggest Arthropod by Walt Brody Paperback BookJapanese Spider Crabs: Nature's Biggest Arthropod by Walt Brody Paperback Book $14.83
Hsc8 Horseshoe Crab 19+ Damaged shell Oddities Curiosities specimen nautical lgHsc8 Horseshoe Crab 19+ Damaged shell Oddities Curiosities specimen nautical lg $34.99 Horseshoe Crab Arthropod Sealife Toy Model Figure by CollectA 88905 NewHorseshoe Crab Arthropod Sealife Toy Model Figure by CollectA 88905 New $17.98
Robert Stanley Crab Arthropod Sea Creature Glass OrnamentRobert Stanley Crab Arthropod Sea Creature Glass Ornament $25.00 hsc17 Horseshoe Crab 12" Taxidermy display ocean aquatic nautical craft marinehsc17 Horseshoe Crab 12" Taxidermy display ocean aquatic nautical craft marine $29.99
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 $45.21 Japanese Spider Crabs: Nature's Biggest Arthropod (Lightning Bolt Books (R) -Japanese Spider Crabs: Nature's Biggest Arthropod (Lightning Bolt Books (R) - $12.44
Amazing fossil Crab from Java, Indonesia good details, big claws! 20myo #24Amazing fossil Crab from Java, Indonesia good details, big claws! 20myo #24 $52.30 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
2 Horseshoe Crab Molt & 2 Sharks Teeth Fossils Great For Science Class Arthropod2 Horseshoe Crab Molt & 2 Sharks Teeth Fossils Great For Science Class Arthropod $9.99 Trilobite Itagnostus Fossil Mineral Sea Life Wheelr Shale Specimen w/ Id CardTrilobite Itagnostus Fossil Mineral Sea Life Wheelr Shale Specimen w/ Id Card $4.99
Marrella Arthropod Lace crab Rubber Realistic Toy Figure Gift 3" Ch491Bb154Marrella Arthropod Lace crab Rubber Realistic Toy Figure Gift 3" Ch491Bb154 $7.59 Q65e Horseshoe Crab Collectible Shadowbox Display Taxidermy Oddities CuriositiesQ65e Horseshoe Crab Collectible Shadowbox Display Taxidermy Oddities Curiosities $54.99
Bandai Ikimono Daizukan Premium Coconuts Crab 200mm Action Figure from JapanBandai Ikimono Daizukan Premium Coconuts Crab 200mm Action Figure from Japan $149.14
Click to see more Crab items at www.ebay.com
Prices current as of last update, 10/12/24 4:41am.

Home Contact Resources Exchange Links eBay