Hydrophis major

Olive headed sea snake

Venomous 💀💀💀💀 Very dangerous ref
Images provided by Flickr-/iNaturalist-API. Sporadic false assignments may occur.


The olive headed sea snake is said to be aggressive. Fatal bites had been caused by this snake. Keep in mind: Its bite is not painful. You can be bitten and envenomated without noticing it in time.
  • Length Adult

  • up to 156 cm ref
  • Length Newborn

  • 42 to 45 cm ref
  • Weight Range

  • ??? gr - 258 gr ref
  • Pupil Shape

  • round (or oval) 
  • Dentition Type

  • fixed front fangs ref
  • Teeth/Fang Length

  • 3.8 mm ref

Altitude range

Vertical distribution

-40 to 0 meter above sea level ref

Subspecies & Common Names

Hydrophis major (not specific) 0 ENGLISH Common Sea Snake, Greater Sea Snake, Olive headed sea snake, FRENCH Hydrophide Cercle

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 major

  • Olive headed sea snake
  • VI. snakeID

  • 575
Complete taxonomy of Hydrophis major at The Reptile Database.