Anzeige
Fauna Marin GmbH Mrutzek Meeresaquaristik Whitecorals.com Osci Motion Tropic Marin OMega Vital

Leptodius affinis Smooth-clawed Rock Crab

Leptodius affinis is commonly referred to as Smooth-clawed Rock Crab. Difficulty in the aquarium: Not suitable for aquarium keeping. Toxicity: Toxic hazard unknown.


Profilbild Urheber Hitoshi Takakura (Flickr Brachyura), Japan

Leptodius affinis,Japan 2025_0291-03

Place: Mitsuishi beach, Manazuru peninsula, Kanagawa pref., Japan (intertidal area of rocky beach, under rock).Comment: carapace width=4cm (approximately)
Courtesy of the author Hitoshi Takakura (Flickr Brachyura), Japan . Please visit www.flickr.com for more information.

Uploaded by Muelly.

Image detail


Profile

lexID:
17953 
AphiaID:
881843 
Scientific:
Leptodius affinis 
German:
Glattscheren Rundkrabbe 
English:
Smooth-clawed Rock Crab 
Category:
Krabben 
Family tree:
Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Xanthidae (Family) > Leptodius (Genus) > affinis (Species) 
Initial determination:
(De Haan, ), 1835 
Occurrence:
Hong Kong, Andaman and Nicobar Islands, Australia, China, Corea, Fiji, French Polynesia, Gulf of Bengal / Bay of Bengal, Gulf of Mannar , India, Indian Ocean, Indonesia, Japan, Marschall Islands, Micronesia, Myanmar, New Caledonia, Palau, Philippines, Sri Lanka, Taiwan, Thailand, Vietnam 
Marine Zone:
Intertidal (Eulittoral), intertidal zone between the high and low tide lines characterized by the alternation of low and high tide down to 15 meters 
Sea depth:
Meter 
Habitats:
Coastal waters, Intertidal zone, Tidal Zone, Rocky shores, Rock coasts, Seawater, Sea water 
Size:
4,0 cm 
Temperature:
°F - 82.4 °F (°C - 28°C) 
Food:
Algae (Algivore), Carrion, No reliable information available, omnivore 
Difficulty:
Not suitable for aquarium keeping 
Offspring:
None 
Toxicity:
Toxic hazard unknown 
CITES:
Not evaluated 
Red List:
Not evaluated (NE) 
Related species at
Catalog of Life
:
 
More related species
in this lexicon
:
 
Author:
Publisher:
Meerwasser-Lexikon.de
Created:
Last edit:
2025-12-07 17:17:14 

Info

Leptodius affinis (De Haan, 1835)

Many species of the family Xanthidae can be poisonous, although they themselves have no poisonous apparatus (poisonous teeth, poisonous spines, poisonous glands in the skin), the consumption of these crustaceans can even be fatal for humans. Such animals are considered passive-poisonous.
The toxins of crabs (saxitoxin and tetrodotoxin) are produced by endobacteria and stored in the flesh of the crab, these e are highly potent and similar to the neurotoxins of puffer fish and just as deadly.
In its raw and cooked meat, consumption of the crab meat is toxic to humans!

Please be sure to clarify whether the meat of these crabs is toxic or non-toxic before eating it!
Call an emergency doctor immediately at the first signs of poisoning (e.g. breathing problems, muscle cramps)!

The good news is there’s no way you can be exposed to these toxins if you don’t try to eat these crabs – a bite or a jab isn’t going to do the job.

The bad news for those who unwittingly consume these crabs is that cooking the meat isn’t going to make the toxins any less effective.

Fortunately, toxic crabs don’t want to be eaten just as much as we shouldn’t be eating them, so they help us out with their glorious warning colours.

Synonymised names
Cancer (Xantho) affinis De Haan, 1835 · unaccepted > superseded combination
Cancer (Xantho) lividus De Haan, 1835 · unaccepted > junior subjective synonym
Chlorodius exaratus var. pictus Stimpson, 1907 · unaccepted > junior subjective synonym
Chlorodius exaratus var. typicus Stimpson, 1907 · unaccepted > junior subjective synonym
Leptodius nigromaculatus Serène, 1962 · unaccepted > junior subjective synonym
Xantho exaratus var. typica Ortmann, 1893 · unaccepted (used in the sense of "typical variety")

External links

  1. researchgate (en). Abgerufen am 07.12.2025.
  2. researchgate (en). Abgerufen am 07.12.2025.
  3. treatment.plazi.org (en). Abgerufen am 07.12.2025.
  4. Wikipedia (de). Abgerufen am 07.12.2025.

Pictures

Commonly


Husbandry know-how of owners

0 husbandary tips from our users available
Show all and discuss