Hydrophis obscurus   Daudin,  1803 (Marine Snake)
Organism information awaits expert curation
Class: Reptilia

Size: Total length 930mm-1.3m; tail 105-108 mm.

Color: Variable; the young are more brightly colored than the adults. The young are bluish, with 45 bright yellowish dorsal bars which encircle the body as rings on the hinder part; a curved yellow mark on the nape. The markings fade with age and the adult is more or less uniform greyish or bluish above and yellowish below.

Extremely eccentric in form, head small, with a curved yellow mark on it. Neck long and whip-like. Body moderately slender, stout, long and compressed posteriorly, reddish brown dorsal bands 55-64 on the body. Scales imbricate, in 35 rows; dorsals 30-32; ventrals 300-320, distinct throughout and feebly enlarged.

Synonym (s)
Hydrophis obscura Daudin, 1803
Hydrophis obscurus Annandale, 1915
Estuarine Sea Snake

Common Name (s)
• Estuarine Sea Snake (English)
• Russell's Sea Snake (English)
Economic Importance and Threats
Threats:  Anthropogenic
(No major threats to this species are known but it may sometimes be captured as bycatch in trawls.)

Habitat:  Demersal
IUCN Status:  Data Deficient


• West Bengal, Sunderbans INDIA
• Orissa, Chilika Lake INDIA
• West Bengal, Hugli River Mouth INDIA
• East Coast INDIA
• Orissa, Bhitarkanika INDIA
• Orissa, Chilka Lake INDIA

Literature Source(s)
  • (2003) IUCN Red list of threatened species Available at - http://www.iucnredlist.org/
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Ahmed, S and Dasgupta, G (1992) Reptilia State fauna series 3: Fauna of West Bengal. Part 2 ZSI, Calcutta 1-65 Available at - NIO, Goa
  • Murthy, TSN (1995) Reptilia and Amphibia Wetland ecosystem series 1: Fauna of Chilka lake ZSI, Calcutta 507-560 Available at - NIO, Goa
  • Sealifebase Available at - http://www.sealifebase.org/
  • Chadha, S and Sekar, KC (1999) Bhitarkanika:myth and reality Nataraj publishers, Dehra Dun Available at - NIO, Goa
  • Padmanaban, P; Venkatraman, C; Palot, MJ and Radhakrishnan, C. A checklist of Sea Snakes (Reptilia) of India Zoological Survey of India Available at - http://zsi.gov.in/checklist/India%20Sea%20Snake.pdf
  • Uetz, P EMBL reptile database Available at - http://www.reptile-database.org/

Page last updated on:2013-02-27

Back to Search