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Trypaea australiensis
Trypaea australiensis.jpg
Trypaea australiensis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Class: Malacostraca
Order: Decapoda
Infraorder: Axiidea
Family: Callianassidae
Genus: Trypaea
Dana, 1852
Species: T. australiensis
Binomial name
Trypaea australiensis
Dana, 1852

Trypaea australiensis, known as the (marine) yabby or ghost nipper in Australia, or as the one-arm bandit due to their occasional abnormally large arm,[1] and as the Australian ghost shrimp elsewhere,[2] is a common species of mud shrimp in south-eastern Australia,[2] the only species in the genus Trypaea.[3][4] T. australiensis is a popular bait used live or frozen by Australians targeting a range of species.[5] It grows to a length of 6 centimetres (2.4 in) and lives in burrows in mudflats or sandbanks, especially in or near estuaries.[6]


  1. ^
  2. ^ a b "Species Trypaea australiensis Dana, 1852". Australian Faunal Directory. Department of the Environment, Water, Heritage and the Arts. 3 June 2010. Retrieved 6 July 2011. 
  3. ^ "Trypaea Dana, 1852". Integrated Taxonomic Information System. Retrieved 6 July 2011. 
  4. ^ Gary Poore (2010). "Trypaea Dana, 1852". World Register of Marine Species. Retrieved 6 July 2011. 
  5. ^ K. Rowling, A. Hegarty & M. Ives, ed. (2010). "Ghost nipper (Trypaea australiensis)". Status of Fisheries Resources in NSW 2008/09 (PDF). Cronulla: NSW Industry & Investment. pp. 143–144. 
  6. ^ "Trypaea australiensis Dana, 1852, Australian ghost shrimp". SeaLifeBase. 23 March 2010. Retrieved 6 July 2011.