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.

This has nothing to do with their feeding habits, but rather with the bright, contrastingly yellow eyes of some Geosesarma species.