Chasmagnathus convexus is a common mud-flat crab of the family Varunidae, which is endemic to East Asia. In Japan, this crab is commonly called hamagani. This crab has two forms that differ in color; one is olive green and the other is purple. Differences in diet are believed to be responsible for the color variation between the two forms. C. convexus is large, relative to related crabs, and can reach 4.5 to 5 centimetres (1.8 to 2.0 in) wide across its carapace. It is predominantly nocturnal.
From Wikipedia, under CC BY-SA 4.0.
Is it venomous or poisonous?
We have no record of Chasmagnathus convexus being toxic, poisonous or venomous. That is not proof that it is safe. Never eat, touch or handle a wild plant, mushroom or animal on the strength of an identification; ask someone qualified.
Easily confused with
- Nanhaipotamon formosanum
- Helice tientsinensis
- Neohelice granulata
- Helice tridens
- Helice latimera
- Nanhaipotamon aculatum
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Malacostraca
- Order
- Decapoda
- Family
- Varunidae
- Genus
- Chasmagnathus
- Species
- Chasmagnathus convexus
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