Supriya Ghosh (Editor)

Hydrophis gracilis

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Kingdom  Animalia
Order  Squamata
Family  Hydrophiidae
Scientific name  Hydrophis gracilis
Rank  Species
Phylum  Chordata
Suborder  Serpentes
Genus  Hydrophis
Higher classification  Hydrophis
Hydrophis gracilis wwwreptariumczcontentphotord03Microcephalop
Similar  Snake, Hydrophis, Hydrophis fasciatus, Hydrophis viperinus, Hydrophis ornatus

The Graceful Small-headed Sea Snake or Slender Sea Snake Hydrophis gracilis is a species of Elapidae (Hydrophiinae-sea snake). Microcephalophis gracilis is a synonym of the snake.


Diagnostic characters

Head small, body long and slender anteriorly; scales on thickest part of body juxtaposed; 5-6 maxillary teeth behind fangs; 17-21 scale rows around neck, 30-36 around thickest part of body (increase from neck to midbody 18-24); ventrals divided by a longitudinal fissure; prefrontal in contact with third upper labial; ventrals 220-287.

Total length males 950 mm, females 1025 mm; tail length males 80 mm, females 95 mm.


  • Indian Ocean (Pakistan, India, Bangladesh, Myanmar, Thailand, Philippines)
  • South China Sea northward to the coast of Fujian (China)
  • Persian Gulf to Bay of Bengal (Oman, United Arab Emirates, Iran)
  • Coast of Malaysia through Indoaustralian Archipelago to New Guinea, New Caledonia, Australia (Queensland), Melanesia, Indonesia
  • References

    Hydrophis gracilis Wikipedia