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Geosesarma dennerle is a species of small land-living crabs found on Java, Indonesia. [1] It is popular in the aquarium trade, [1] where G. dennerle, in particular, is often simply called Vampire Crab. Crabs called "Geosesarma bicolor Krakatau Vampirkrabbe" are probably also G. dennerle. [1]
The Red Devil Vampire crabs are sexually dimorphic and males have a narrow and slimmer plate while females have a broad plate on their belly and they might also be carrying around some fertilized eggs. Another difference between male and female crabs is in their claws: males have larger and brighter claws while females have smaller claws.
Geosesarma is genus of small freshwater or terrestrial crabs, typically less than 10 mm (0.4 in) across the carapace. [2] They live and reproduce on land with the larval stages inside the egg. They are found from India, [3] through Southeast Asia, to the Solomon Islands and Hawaii. [2] In the pet trade, they are sometimes called vampire crabs.
Geosesarma rouxi is a species of small, semi-terrestrial freshwater crabs native to Java, Indonesia. [ 1 ] [ 2 ] They are commonly known in the pet trade as rainbow vampire crabs. [ 2 ]
Geosesarma larsi is a species of small land-living highland crab found in western Sarawak, Borneo. Adults have a carapace width of 12–15 mm and are of a purplish-red colour, which distinguishes them from other Geosesarma species in Borneo. The species is threatened by the loss of their small habitat. [1] [2]
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The crabs can travel up to 1.46 km (0.91 mi) in a day, and up to 4 km (2.5 mi) in total. [4] Only a few land crabs, including certain Geosesarma species, have direct development (the mother carries the eggs until they have become tiny, fully developed crabs), and these do not need access to water to breed.
Ocypode africana, commonly known as the African ghost crab, is a species of ghost crabs native to the eastern Atlantic coast of western Africa, from Mauritania to Namibia. [2] They are medium-sized ghost crabs reaching carapace width of 3.4 cm (1.3 in). They can vary in coloration from pinkish to dark grey.