Krohnitta pacifica   (Aida,  1897) (Marine Worm)
Organism information awaits expert curation
Class: Sagittoidea

Image copyrights: A. Pierrot-Bults

Size: Total length 3-5 mm; tail 30-32 %.

Body short and broad with prominent neck. Transversal musculature absent. Head fairly large. Hooks not serrated. Fin bridge absent; one pair of short lateral fins both on trunk and tail; posterior fins short, partially rayed, rounded. Collarette absent; gut diverticula absent. Small eyes, with star-shaped pigment spot. Seminal vesicles with knob and trunk; position of seminal vesicles: touching both posterior fins and tail fin. Ovaries of medium length, reaching to region of ventral ganglion; ova very large. Adhesive papillae and adhesive organs absent. Apical glands absent.

Synonym (s)
Eukrohnia pacifica Michael, 1911
Krohnia kerberti Oye, 1918
Krohnia pacifica Varadarajan and Chac, 1943
Krohnitta subtilis Burfield and Harvey, 1926
Krohnitta subtilis Ritter-Zahony, 1912
Krohnia pacifica Aida, 1897
Krohnitta pacifica Tokioka, 1939
Krohnitta mutabbii Alvarino, 1969

Common Name (s)
Economic Importance and Threats

Habitat:  Pelagic, Estuarine, Coastal


• West Bengal, Hugli Matla Estuary INDIA
• Tamil Nadu, Chennai Coast INDIA
• Maharashtra, Mumbai INDIA
• Arabian Sea (Lat: 16) (Long: 62) INDIA (Record: 12/09/1991-23/09/1991) (Depth: 200-500 mts)
• Arabian Sea (Lat: 23) (Long: 73) INDIA (Record: 12/09/1991-23/09/1991) (Depth: 200-500 mts)
• West Coast INDIA
• Palk Bay INDIA (Record: 01/1955-12/1958)
• Tamil Nadu, Gulf of Mannar INDIA (Record: 01/1955-12/1958)

Literature Source(s)
  • Alfred, JRB; Das, AK and Sanyal, AK (Eds.) (1998) Faunal diversity in India ZSI, Calcutta 1-497 Available at - NCL, Pune
  • Venkatraman, K; Srinivasan, M; Satyanarayana, CH and Prabhakar D (2002) Faunal diversity of Gulf of Mannar biosphere reserve Conservation area series 15 ZSI 77 pp; VIII pla Available at - NCL, Pune
  • Fenaux, R Appendicularia from Indian Ocean, the Red Sea and Persian Gulf Biogeography of the Indian Ocean 409-414 Available at - NIO, Goa
  • Nair, VR Chaetognatha NIO, Goa Available at -
  • Conway, DVP; White, RG; Hugues-Dit-Ciles, J; Gallienne, CP and Robins, DB (2003) Guide to the coastal and surface zooplankton of the south western Indian Ocean Occasional publication no 15 Marine Biological Association of the United Kingdom Occasional Publication of the Marine Biological association of the United Kingdom 354 pp Available at -
  • Hussain, SM Brief report on biodiversity in the coastal areas of Pakistan p 113
  • Troost, DG; Sutomo, AB and Wenno, LF (1976) Distribution and abundance of major zooplankton groups in Ambon Bay (Maluku, Indonesia) during a salp swarming, with notes on Chaetognatha and Pteropoda species Marine Research in Indonesia Lembaga Oseanologi Nasional (National Institute of Oceanology) Lembaga Ilmu Pengetahuan Indonesia, Jakarta, Indonesia 16 31-44 Available at - NIO, Goa
  • Michel, HB; Behbehani, M and Herring, D (1986) Zooplankton of the western Arabian Gulf south of Kuwait waters Kuwait Bulletin of Marine Science 8(1435) 13150 Available at - NIO, Goa
  • Michel, HB; Behbehani, M; Herring, D; Arar, M; Shoushani, M and Brakoniecki T (1986) Zooplankton diversity, distribution and abundance in Kuwait waters Kuwait Bulletin of Marine Science 8 37-105 Available at - Zoological records
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Haldar, BP (1995) Chaetognatha Estuarine ecosystem series, Part 2: Hugli Matla Estuary ZSI, Calcutta 319-326 Available at - NIO, Goa
  • World Biodiversity Database Available at -
  • Dr. Ramesh, R; Dr. Nammalwar, P and Dr. Gowri, VS (2008) Database on coastal information of Tamil Nadu Report Submitted to Environmental Information System (ENVIS) Centre, Department of Environment, Government of Tamil Nadu Institute for Ocean Management, Anna University, Chennai, Tamil Nadu. Available at -
  • Nair, VR; Gajbhiye, SN and Desai, BN (1991) Effect of pollution on the distribution of chaetognaths in the nearshore waters of Bombay. Indian Journal of Marine Sciences 20(1) 43-48 Available at - NIO, Goa
  • Sealifebase Available at -
  • Goswami, SC and Srivastava, Y (1996) Zooplankton standing stock, community structure and diversity in the northern Arabian Sea Proceedings of the Second Workshop on Scientific Results of FORV Sagar Sampada Department of Ocean Development, New Delhi, India 127-137p Available at -
  • Srinivasan, M (1947) Distribution of chaetognaths,with special reference to Sagitta decipiens as an indicator of upwelling along the west coast of India Journal of the marine biological association of India The marine biological association of India 16(1) 126-142 Available at -
  • Sudarsan, D (1961) Observations on the chaetognatha of the waters around Mandapam Indian Journal of Fisheries Indian Council of Agricultural Research 8 (2) 364-382 Available at -

Page last updated on:2011-05-31

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