Species of Thailand

Crab-eating frog

Fejervarya cancrivora, Johann Ludwig Christian Gravenhorst, 1829

(In Thai: กบน้ำเค็ม)

The crab-eating frog (Fejervarya cancrivora), is a frog native to south-eastern Asia including Taiwan, China, the Philippines and more rarely as far west as Orissa in India. It inhabits mangrove swamps and marshes and is the only known modern amphibian which can tolerate salt water. It is locally favored for its eating quality and is often farmed for its edible legs.

This frog can tolerate marine environments (immersion in sea water for brief periods or brackish water for extended periods) by increasing urea production and retention, and by remaining slightly hyperosmotic within urea and sodium flux. Adults can survive in salt water with salinity as high as 2.8%, and tadpoles can survive salinities as high as 3.9%.

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Scientific classification

Kingdom
Animalia
Phylum
Chordata
Class
Amphibia
Order
Anura
Family
Dicroglossidae
Genus
Fejervarya
Species
Fejervarya cancrivora

Common names

  • English:
    • Crab-eating frog
    • Mangrove frog
    • Rice field frog
    • Asian brackish frog
  • Thai:
    • กบน้ำเค็ม
    • กบน้ำเค็มใหญ่

Synonyms

  • Fejervarya raja, Malcolm Arthur Smith (1930)
  • Rana cancrivora ssp. raja, Malcolm Arthur Smith (1930)
  • Rana cancrivora, Johann Ludwig Christian Gravenhorst (1829)

Conservation status

Least Concern (IUCN3.1)

Least Concern (IUCN3.1)

Photos

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Fejervarya cancrivora
Fejervarya cancrivora

Range Map

Distribution map of Crab-eating frog, Fejervarya cancrivora in Thailand
  • Tarutao National Marine Park
Range map of Fejervarya cancrivora in Thailand