Genus Portunus is a type of crab that is commonly found in the sea. This crab is known for its hard shell and delicious taste. There are various synonyms for the term "Genus Portunus" which include blue crab, Samoan crab, and sand crab. The blue crab is known for its distinct blue coloration, while the Samoan crab is found in the Pacific region and is commonly used in local cuisine. Sand crab, on the other hand, is often found in sandy beaches and is preferred by many seafood lovers for its soft and succulent flesh. While these crabs have different names, they all belong to the same Genus Portunus family and are enjoyed by people all over the world.