Matuta purnama, also known as the purple crab, is a species of crab belonging to the family Matutidae. This species is found in coastal waters and is a common sight in intertidal zones.
Description and Characteristics
Matuta purnama is characterized by its distinct purple coloration and robust, flattened carapace. The adults can grow up to a maximum size of 10 cm in carapace width. The carapace is covered in small granules, and the eyes are positioned on stalks that protrude from the sides of the carapace. The legs are long and strong, well-adapted for walking and digging in the sandy substrate.
Habitat and Occurrence
Matuta purnama is a benthic species, meaning it primarily lives on or near the seafloor. It is typically found in shallow, coastal waters, particularly in sandy or muddy intertidal zones. The species can be found in a variety of marine zones, including the intertidal zone, the subtidal zone, and the neritic zone. This wide range of habitat preference allows Matuta purnama to thrive in a variety of coastal environments.
Taxonomy
Matuta purnama belongs to the Class Malacostraca, Order Decapoda, and Family Matutidae. This classification places it within a group of crustaceans that are characterized by their ten legs, including the prominent claws. The family Matutidae contains a diverse group of crabs, many of which are found in tropical and subtropical regions around the world.
Feeding
Matuta purnama is an omnivorous scavenger, feeding on a variety of organic matter, including dead animals, algae, and detritus. They use their powerful claws to break down food and their long legs to navigate through the substrate in search of sustenance. Their omnivorous diet and scavenging behavior make them important contributors to the coastal ecosystem’s nutrient cycle.
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