Zonosagitta pulchra

Scientific Name:-

Zonosagitta pulchra

Common Name:-

Arrow worm

Malayalam Name:-

Nill

Category:-

Chaetognatha

Status:-

Description:-

Hooks: 6-7; anterior teeth: 8-10; posterior teeth: 8-16. Maximum adult body length: 24 mm; tail: 15-20 %. Body firm, opaque; transversal musculature absent; head wide; hooks not serrated. Fin bridge absent. Anterior fins long, partially rayed, angular; posterior fins of medium length, partially rayed, angular. Collarette short; 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 small. Adhesive papillae and adhesive organs absent. Apical glands absent.

Threats:-

Not recorded.

Remark:-

Recorded off Vizhinjam in Kerala coast.

Habitat:-

Epipelagic.

Synonyms:-

Sagitta pulchra Doncaster, 1903

References:-

George, R.M., Thomas, P.A., Jasmine, S., Nair, KR. and Vasanthakumar, R. (1998). Observations on the distribution and seasonal fluctuations of chaetognaths off Vizhinjam, southwest coast of India. Journal of the Marine Biological Association of India, 40(1&2): 6-10.

Thuesen, Erik V. (2012). Zonosagitta pulchra. Accessed through: World Register of Deep-Sea species at http://www.marinespecies.org/deepsea/aphia.php?p=taxdetails&id=266888 on 2013-01-04

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