The Beaded Crab, scientifically known as Daira perlata, is a fascinating crustacean found in the intertidal zone of various coastal regions. This crab is distinguished by its unique appearance and remarkable adaptations to its challenging environment.
Description & Characteristics
The Beaded Crab, Daira perlata, is a relatively small crab, typically reaching a maximum size of around 2.5 cm in width. Its carapace, or shell, is a distinctive reddish-brown color and exhibits a prominent, beaded texture, giving the crab its name. These beads are actually small, rounded bumps that cover the surface of the shell. This rough, textured surface provides camouflage and protection from predators.
Habitat and Occurrence
The Beaded Crab, Daira perlata, prefers the harsh and dynamic environment of the Supratidal (Supralitoral) zone, which is the area above the high tide mark that still receives the influence of seawater. Specifically, they are found in the spray water area, also known as the splash water area, where the influence of the sea is clearly stronger than that of the land. This zone is characterized by high salinity, fluctuating temperatures, and exposure to air for extended periods.
Taxonomy
The Beaded Crab, Daira perlata, is classified within the animal kingdom as follows: It belongs to the phylum Arthropoda, class Malacostraca, order Decapoda, and family Dairidae. The family Dairidae encompasses a group of crabs with unique characteristics, and the Daira perlata species is a notable representative.
Feeding
The Beaded Crab, Daira perlata, is a carnivore that primarily feeds on zoobenthos, which are small animals living on the seafloor. These include worms, snails, and clams. They are also known to be scavengers and will readily consume carrion. Their feeding habits make them an important part of the intertidal food web.
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