Thai National Parks

Reptiles of Thailand

Species of Thailand

Cantor's mangrove snake

Binomial name: Cantoria violacea (Charles Frédéric Girard, 1857)

Cantoria violacea, commonly known as Cantor's Water Snake, is a species of snake found in tropical Asia.


Rostral broader than deep. Frontal a little longer than broad, shorter than its distance from the end of the snout, and shorter than the parietals. Eye between four shields: a preocular, a supraocular, a postocular, and a subocular. Loreal longer than deep. One elongate anterior temporal, in contact with the postocular and the subocular. 5 upper labials. 3 lower labials in contact with the anterior chin shields, which are not longer than the posterior chin shields.

Dorsal scales smooth, without apical pits, in 19 rows. Ventrals 266-278; anal divided; subcaudals 56-64.

Blackish above, with white transverse bands, which widen towards the abdomen. These bands are very narrow in the typical form, wider in the var. dayana, but constantly much narrower than the black interspaces. Some white spots on the head. Lower parts white, with greyish spots, which are continuations of the dorsal crossbands. These bands may form complete rings on the tail.

Total length 3 feet: tail 4 inches.


Myanmar, southern Thailand, Indonesia (Kalimantan, Sumatra, Timor), India (Andaman Islands), western Malaysia (Malaya), and Singapore.

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Scientific classification

Cantoria violacea

Common names

  • German: Cantors Wasserschlange
  • English: Cantor's mangrove snake, Cantor's water snake, Yellow-banded mangrove snake
  • Thai: งูปากกว้างลาย


  • Cantoria violacea, John C. Murphy & Harold K. Voris (2014)
  • Cantoria violacea, Ulrich Manthey & Wolfgang Grossmann (1997)
  • Cantoria violacea, Alice Georgie Cruickshank Grandison (1978)
  • Cantoria dayana, John Anderson (1871)
  • Cantoria dayana, Ferdinand Stoliczka (1870)
  • Cantoria elapiformis, Albert Charles Lewis Günther (1869)
  • Cantoria elongata, Albert Charles Lewis Günther (1864)
  • Hemiodontus elapiformis, Giorgio Jan (1863)
  • Hydrodipsas elapiformis, Wilhelm Karl Hartwich Peters (1859)
  • Cantoria violacea, Charles Frédéric Girard (1858)

Cantor's mangrove snake is found in following locations in Thailand

Please note that this non-official list is not complete nor necessarily accurate. This list is a summary of checklists from other websites, blogs, publications, photo/videos published on various websites or our own findings. We appreciate your contributions with photo proof.

  • Phuket Coast

Conservation status

Least Concern (IUCN3.1)

Least Concern (IUCN3.1)

No photo for this species yet

Distribution map of Cantor's mangrove snake, Cantoria violacea in Thailand
  • Phuket Coast

Range map of Cantoria violacea in Thailand

Important note; our range maps are generated automatically based on very limited data we have about the protected sites, the data is not necessarily accurate. Please help us to improve our range maps by sharing your findings/knowledge.