Portunus is a genus of crabs which includes several important species for fisheries, such as the blue swimming crab and the Gazami crab. Other species, such as the three-spotted crab are caught as bycatch.

The genus Portunus contains 13 extant species and another 26 species known only from fossils. Fossils of crabs within this genus can be found in sediment of Europe, the United States, Mexico, Venezuela, Brazil and Australia from Paleogene to recent (age range: 48.6 to 0.0 million years ago).

...