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Hydrophis melanocephalus

Black Headed Slender Necked 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 161 cm ref
  • Length Newborn

  • unknown
  • Reproduction

  • unknown ref
  • Pupil Shape (when closed!)

  • unknown ref
  • Fangs

  • fixed ref front-fanged ref

Subspecies & Common Names

Hydrophis melanocephalus  ENGLISH Black Headed Sea Snake, Black Headed Slender Necked Sea Snake, Slender Necked Sea Snake, KOREAN 먹대가리바다뱀, UNCODED LANGUAGES Kuro Gashira Umi Hebi 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 melanocephalus

  • Black headed Slender necked Sea Snake
  • VI. snakeID

  • 642
Look up complete taxonomic records of Hydrophis melanocephalus (including synonyms) at THE REPTILE DATABASE (by Peter Uetz et al).