Hydrophis melanocephalus

Black headed Slender necked Sea Snake

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


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

  • up to 161 cm ref
  • Length Newborn

  • unknown
  • Weight Range

  • ??? gr - ??? gr
  • Pupil Shape

  • Dentition Type

  • fixed front fangs ref
  • Teeth/Fang Length


Altitude range

Vertical distribution

??? to ??? meter above sea level ref

Subspecies & Common Names

Hydrophis melanocephalus (not specific) 0 ENGLISH Black headed sea snake, Black headed Slender necked Sea Snake, Slender necked Sea snake, KOREAN 먹대가리바다뱀, UNCODED LANGUAGES Kuro Gashira Umi Hebi

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 melanocephalus

  • Black headed Slender necked Sea Snake
  • VI. snakeID

  • 642
Complete taxonomy of Hydrophis melanocephalus at The Reptile Database.