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Hydrophis gracilis

Slender Sea Snake

Venomous 💀💀💀💀 Very dangerous bite ref
Images automatically provided by Flickr & iNaturalist. Sporadic false assignment does occur.


The bite of most elapids is not painful. You can be bitten and envenomated without noticing it.
  • Length Adult

  • up to 122 cm ref
  • Length Newborn

  • unknown
  • Reproduction

  • ovoviviparous ref
  • Pupil Shape (when closed!)

  • round (or oval) ref
  • Fangs

  • fixed ref front-fanged ref

Altitude range

Vertical distribution

-30 meter above sea level (a.s.l.) ref

Subspecies & Common Names

Hydrophis gracilis  CHINESE 小頭海蛇 (Xiǎo Tóu Hǎishé), ENGLISH Banded Small Headed Sea Snake, Common Small Headed Sea Snake, Graceful Slender Sea Snake, Graceful Small Headed Sea Snake, Gracile Small Headed Sea Snake, John's Sea Snake, Slender Sea Snake, Small Headed Slender Sea Snake, GERMAN Kleinköpfige Ruderschlange, SINHALA Muhudu Naya, UNCODED LANGUAGES Daryai Mar, Samundri Sanp ref

Full Taxonomy

  • I. Superfamily Colubroidea

  • Colubrids, elapids and vipers
  • II. Family Elapidae

  • Elapids
  • III. Subfamily Hydrophiinae

  • Sea snakes
  • IV. Genus Hydrophis

  • Sea snakes
  • V. Species Hydrophis gracilis

  • Slender sea snake
  • VI. snakeID

  • 618
Look up complete taxonomic records of Hydrophis gracilis (including synonyms) at THE REPTILE DATABASE (by Peter Uetz et al).