Marble crab, Metasesarma obesum
  • pretty little crab
  • does not need a water part
  • social group animal
  • does not go to plants
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Marble crab, Metasesarma obesum

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Marble crab, Metasesarma obesum
The pretty little mangrove crab Metasesarma obesum is a great little crab for a planted terrarium. The animals form a relationship with their keeper and at feeding time, for example, react quite clearly to humans in front of the glass pane. They are also often seen during the day and offer the observer a wide range of interesting behaviors. - Garnelio

The marble crab Metasesarma obesum is a small land crab that makes its home in the Indo-West Pacific, where it occurs in large populations, sometimes even on small islands without any freshwater source. The marble crab gets its name from the marbled pattern on a light brown background that the animals often display. Basically, however, it is extremely variable in color, there are also animals with darker carapace. Common to all of them is the dark brown facial mask and the lighter, thick as if inflated claws.

The very social Metasesarma obesum belongs to the mangrove crabs. The sociable small crabs with a carapace width of only 2.5-3 cm can be kept in a group of three animals already in smaller terrariums from 40 cm. Here you should make sure that the group has more females than males. The males can be easily identified by their abdominal flap: It tapers to a v-shape in the front, whereas the abdominal flap of the females has the shape of an upside-down U.

The breeding of Metasesarma obesum has not yet been successful in the hobby. The females carry a very large number of very small eggs and release floating larvae into the sea after the end of the gestation period, which need seawater or brackish water to develop into crabs.

In the aquaterrarium Metasesarma obesum does not need a large water section, a shallow bowl of fresh water is sufficient. If you like, you can also offer a shallow bowl with seawater. Now and then the animals sit with their legs in the water, but basically they are happy and often on land and use all possibilities to climb.

Accordingly, the terrarium should be furnished varied and offer the animals climbing opportunities and also hiding places. Cork bark, twigs, roots and stones are gladly accepted. They also like to burrow, an 8-10 cm high layer of terrarium humus is gratefully accepted. The substrate should be kept permanently moist, so a sufficiently high humidity is also guaranteed. Since Metasesarma obesum does not attack plants, the terrarium can be nicely planted and designed.

A heating is not necessary, the marble crab prefers air temperatures between 20 and 30 °C, room temperature or the warming by the terrarium lighting is thus completely sufficient.

The terrarium must be tightly closed, Metasesarma obesum is a curious animal and likes to wander.

Metasesarma obesum is a predominantly carnivorous crab, so it prefers meaty food: protein food, frozen food, unseasoned raw fish, freeze-dried insects and so on. Of course, it also gladly accepts special food for carnivorous crabs. Brown fall foliage should always be in the terrarium, although the animals do not often nibble on it, they do like to take the foliage as a hiding place. Also live food in the form of white isopods or springtails is gladly hunted and eaten. These small animals can live permanently in the aquaterrarium, they take care of food remains and serve as a food source at the same time

The marble crab should not be socialized, it needs a species terrarium. Since this is a very social group animal, it should not be kept alone. In good conditions Metasesarma obesum can live for several years.

Scientific name Metasesarma obesum (Dana, 1851)
German name: Marble crab
Difficulty level: for beginners
Origin/Distribution: Indo-West Pacific
Coloration: light brown crab with dark brown face, light beige to almost white claws and reddish brown to dark brown marbled pattern, very variable in coloration
Age expectancy up to 8 years
Parameters: shallow dish with fresh water, shallow dish with salt water, air temperature 20 to 30 °C
Size of the aquaterrarium: from 60 cm for a group of 5-6 animals, from 40 cm for 3 animals. Pay attention to excess of females!
Food Protein food, brown autumn leaves, frozen food, freeze-dried insects and crustaceans, fish meat, special food for carnivorous crabs
Reproduction difficult, larvae hatch and develop in brackish to seawater
Behavior peaceful, group animal
Socialization please only in a species tank
Further information Colorful jewels in the terrarium - land crabs of the genus Geosesarma, micro crabs, Limnopilos nayanetri - The smallest crab in the world!, Keeping mangrove crabs
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Marble crab, Metasesarma obesum

Marble crab, Metasesarma obesum

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Question: "Mich würde interessieren wann die Marmorkrabben voraussichtlich wieder an Lager sein werden. Danke für eine Rückmeldung."

from Kevin (Garnelio)
from Kevin (Garnelio)

Hallo Lukas, vielen Dank fuer deine Frage! Wir rechnen damit die Tiere binnen 4 Wochen wieder vor Ort zu haben. 

Question: "Wann werden diese Krabben wieder ieferbar sind? Das Problem mit den Geschlechtern versteh ich schon, nur wenn ich dann 8 Männchen und 2 Weibchen bekommen wrde könnte sein daß sich die Männchen dann bekriegen? Danke im voraus für die Antwort."

from Kevin (Garnelio)
from Kevin (Garnelio)

Hallo Anna, vielen Dank für deine Frage! Hinterlege deine Mail und du erhältst sofort Bescheid wenn die Tiere da sind. Wir versenden stets die sinnvollsten Gruppen die wir versenden können. 

Question: "Wann werden diese kleinen Krabbn wieder verfügbar sein? Ich hätte gerne 10, vor allem Weibchenm wie Sie es ja auch empfehlen. Kann ich sie auch schon vorher reservieren? Danke füpr Ihre Antwort,#"

from Kevin (Garnelio)
from Kevin (Garnelio)

Hallo Anna, vielen Dank für deine Frage! Wir bieten bei den Tieren derzeit leider keine Geschlechtsselektion an. Reservierungen sind über den Kundenservice möglich. 

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