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Hydrophis spiralis

Narrow Banded Sea Snake

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


A snake that is described as aggressive. Reports say that it will bite at little provocation without hesitation. This huge snake has long fangs and a big venom supply.


The narrow banded sea snake is the longest sea snake known to science.
  • Length Adult

  • up to 275 cm ref
  • Length Newborn

  • unknown
  • Reproduction

  • unknown ref
  • Pupil Shape (when closed!)

  • round (or oval) ref
  • Fangs

  • fixed ref front-fanged ref

Altitude range

Vertical distribution

-10 meter above sea level (a.s.l.) ref

Subspecies & Common Names

Hydrophis spiralis  ENGLISH Blotched Backed Giant Sea Snake, Narrow Banded Sea Snake, Spiral Sea Snake, Yellow Sea Snake, FRENCH Hydrophide Spirale, GERMAN Gelbe Ruderschlange, SINHALA Mudu Naya 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 spiralis

  • Narrow banded Sea Snake
  • VI. snakeID

  • 645
Look up complete taxonomic records of Hydrophis spiralis (including synonyms) at THE REPTILE DATABASE (by Peter Uetz et al).