Are there freshwater crab species?

With a carapace size of around 1 cm (0.4 inch), Thai micro crabs are by far the smallest crab species on this list. These tiny crabs are fully aquatic and naturally found in a freshwater river in Thailand. read more

There are many species that live in fresh water--especially in the streams and billabongs of Australia--but also on every other continent. The Southern European crab, Potamon fluviatile, pictured, has been eaten by people since Roman times. read more

There are more than 1,300 described species of freshwater crabs, out of a total of 6,700 species of crabs across all environments. The total number of species of freshwater crabs, including undescribed species is thought to be up to 65% higher, potentially up to 2,155 species, although most of the additional species are currently unknown to science. read more

The fiddler crab is also referred to as a mini crab. The species thrives best in water that is slightly brackish and in an aquarium with an internal filter. Mini crabs will grow to up to 2 inches. They are usually peaceful crabs that are fairly easy to care for; they can be quite interesting to watch while they are scavenging for food. read more