What type of group does the fiddler crab belong in?

The fiddler crab belongs in the group of Crustaceans. Crustaceans are a diverse group of arthropods that includes crabs, shrimp, lobsters, crayfish, and barnacles. They are typically found in aquatic environments, but some species can also be found in terrestrial habitats. Crustaceans have a segmented body, two pairs of antennae, and five pairs of legs. The first pair of legs is modified into claws, which are used for capturing food and defense. The other four pairs of legs are used for walking, swimming, or climbing. Crustaceans have a complex digestive system and a well-developed nervous system. They also have a unique respiratory system that allows them to breathe both in water and on land.