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Candacia truncata

Dana (1849)

Download a fact sheet for Candacia truncata (PDF 777KB)


Phylum Arthropoda
Subphylum Crustacea
Class Maxillopoda
Subclass Copepoda
Order Calanoida
Family Candaciidae
Genus Candacia
Species truncata


  • Female: 1.84 - 2.10 mm
  • Male: 1.87 - 2.11 mm

Distinguishing characteristics

  • Genital somite and P5 form


  • Geniculate right A1 has a series of stout proximal segments followed by a thin section, then a broad club section, beyond club section, segment 16 has a finger-like protrusion which is difficult to observe clearly; fused segments 17 and 18 are characteristically curved
  • Last prosome somite symmetrical with sharp points
  • P5 left segment 4 with 3 setae; right P5 not chelate and segment 3 terminates in long plumose setae
  • Urosome and caudal rami symmetrical with no projections


  • A1 23 segmented, proximal 8 segments thickened
  • A characteristic square end to the last prosome somite when viewed laterally
  • Corners of prosome are pointed & directed forwards, so points not visible in dorsal view
  • P5 segment 3 with terminal finger-like processes finely serrated distally; inner margin setae subequal, distal most seta slightly longer than proximal seta
  • Urosome quite symmetrical with no protuberances
  • Anal somite short and often fused with caudal rami


  • Epipelagic; open ocean
  • Tropical and subtropical
  • Pacific and Indian Oceans; probably not Atlantic


  • Specialised predator, grasping prey with large and robust maxillae
  • Larvaceans are major prey item


  • Boxshall, G. A. and S. H. Halsey (2004). "An introduction to copepod diversity." Ray Society Publications 166: i-xv, 1-966.
  • Bradford-Grieve, J. M., (1999) The marine fauna of New Zealand: pelagic calanoid copepoda: Bathypontiidae, Arietellidae, Augaptilidae, Heterorhabdidae, Lucicutiidae, Metridinidae, Phyllopodidae, Centropagidae, Pseudodiaptomidae, Temoridae, Candaciidae, Pontellidae, Sulcanidae, Acartiidae, Tortanidae. National Institute of Water and Atmospheric Research, Wellington, New Zealand.
  • Chen Q. C. & Zhang S. Z, 1965. The planktonic copepods of the Yellow Sea and the East China Sea. I. Calanoida. Studia mar. sin., 7: 20-131. (Chinese with English summary).
  • Conway DVP, White, R.G., Hugues-Dit-Ciles, J., Gallienne, C.P. and Robins, D.B. (2003). Guide to the coastal and surface zooplankton of the south-western Indian Ocean, Vol Occasional Publications No. 15. Marine Biological Association of the United Kingdom.
  • Greenwood, J. G. (1978). "Calanoid copepods of Moreton Bay (Queensland) 3. Families Temoridae to Tortanidae, excluding Pontellidae." Proceedings of the Royal Society of Queensland 89: 1-21.
  • Razouls C., de Bovée F., Kouwenberg J. et Desreumaux N., 2005-2009. Diversity and Geographic Distribution of Marine Planktonic Copepods. Available at
  • Tanaka O., 1935. The Copepoda of Sagami Bay. Part II. The family Candaciidae. Suisan Gakkai Ho, 6 (4): 210-227. (Japanese).