Mud crabs are large, robust crustaceans found in coastal regions, particularly in mangroves and estuaries. They belong to the family Portunidae and are known for their strong claws, which they use for defense and capturing prey. These crabs have a hard shell that can vary in color, often appearing greenish or brownish, helping them blend into their muddy habitats. Mud crabs are popular in many cuisines, especially in Southeast Asia and Australia, where they are often harvested for their sweet, tender meat. They are typically caught using traps or nets and are a significant part of local fisheries. Their life cycle includes a larval stage that develops in the open ocean before returning to estuaries as juveniles.