Cute Fiddler Crab
Species: Uca chlorophthalm
This fiddler crab is usually smaller than 2 cm. It is the cutest too. Someone even keeps fiddler crabs as pet. But keep in mind they are hard to keep physiologically happy. Most fiddler crabs are semi-terrestrial, meaning that they don't like to be underwater all the time. An ideal aquarium for fiddlers would be bad for most other animals.