- English Common Name
- Mud-flat Crab
- Scientific name
- Chasmagnathus convexus
- Taxonomy
- Order: Decapoda, Family: Varunidae
- Size
- 3.7 cm – 5.0 cm (width of carapase)
- Species Distribution
- In Japan, Aomori prefecture and southward on the Pacific side. Fukui prefecture and southward on the Japan Sea side. Other distribution areas include Japan, Korea, Taiwan, and coastal areas of China.
- Marine Animal Red List of Threatened Species (by Ministry of the Environment, Government of Japan):Near Threatened
- This is the only species in the genus Chasmagnathus. This species constructs burrows in embankments of paddle field water channels and wetlands located in basins or river mouths. This species is omnivorous, but often feeds on plants such as reeds.
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- Updated March 2019
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