Thai National Parks

Species of Thailand

Cantor's mud snake

Cantoria violacea, Charles Frédéric Girard, 1857

(In Thai: งูปากกว้างลาย, ngu paak guang lai)

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 mud snake
    • Cantor's water snake
    • Cantor's mangrove snake
    • Yellow-banded mangrove snake
  • Thai: งูปากกว้างลาย, ngu paak guang lai


  • 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)

Conservation status

Least Concern (IUCN3.1)

Least Concern (IUCN3.1)


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Cantoria violacea - Kra Buri District, Ranong
Cantoria violacea - Kra Buri District, Ranong

Range Map

Distribution map of Cantor's mud snake, Cantoria violacea in Thailand
  • Kra Buri District, Ranong
  • Phuket Coast
  • Suk Samran District, Ranong
Range map of Cantoria violacea in Thailand