Calappa

Calappa is a genus of crabs in the family Calappidae, commonly known as “box crabs“. They are characterized by their flattened, box-like carapace and large, powerful claws. These crabs are widely distributed in tropical and subtropical waters worldwide, inhabiting a variety of marine habitats. Common NamesCalappa crabs are known by a variety of common names, including:Box crabCalappa crabHorseshoe crab (not to be confused with the true horseshoe crabs, which are chelicerates)Shell crabCharacteristicsMembers of the genus Calappa have a distinctive box-like carapace, which is wider than it is long. The carapace is also flattened, giving the crab a low profile. The claws are large and powerful, and they are used for crushing prey. The walking legs are relatively short and are often used for digging. The abdomen is tucked under the carapace, which helps to protect it from predators. EnvironmentsCalappa crabs are typically found in shallow water, on sandy or muddy bottoms. They often burrow into the substrate, using their claws and legs to dig. They are also found in association with coral reefs and seagrass beds. ReferencesFor more information about Calappa crabs, refer to these reliable sources: World Register of Marine Species (WoRMS) Calappa granulata: A New Invasive Species in Brazilian Waters Animal Diversity Web