Portunus
Portunus is a genus of crab which includes several important species for fisheries, such as the blue swimming crab, Portunus pelagicus and the Gazami crab, P. trituberculatus. Other species, such as the three-spotted crab are caught as bycatch.
The genus Portunus contains more than 90 extant species and over 40 further 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.
The extant species are as follows:
| Species | Authority | Date | Subgenus |
| Portunus aburatsubo | 1922 | Lupocycloporus | |
| Portunus acerbiterminalis | 1967 | Xiphonectes | |
| Portunus acuminatus | 1871 | Portunus | |
| Portunus affinis | 1893 | Portunus | |
| Portunus alcocki | 1905 | Xiphonectes | |
| Portunus anceps | 1858 | Portunus | |
| Portunus andersoni | 1887 | Xiphonectes | |
| Portunus angustus | 1898 | Achelous | |
| Portunus arabicus | 1905 | Xiphonectes | |
| Portunus argentatus | 1861 | Monomia | |
| Portunus armatus | 1861 | Portunus | |
| Portunus asper | 1861 | Portunus | |
| Portunus australiensis | 1973 | Monomia | |
| Portunus brevimanus | 1895 | Achelous | |
| Portunus brockii | 1887 | Xiphonectes | |
| Portunus convexus | 1835 | Portunus | |
| Portunus curvipenis | 1961 | Monomia | |
| Portunus dayawanensis | 1986 | Xiphonectes | |
| Portunus depressiformis | 1859 | Achelous | |
| Portunus dubius | 1906 | Achelous | |
| Portunus elongatus | 1861 | Achelous | |
| Portunus euglyphus | 1906 | Monomia | |
| Portunus floridanus | 1930 | Achelous | |
| Portunus gibbesii | 1859 | Portunus | |
| Portunus gladiator | 1798 | Monomia | |
| Portunus gracilimanus | 1858 | Lupocycloporus | |
| Portunus gracillimus | 1858 | Xiphonectes | |
| Portunus granulatus | 1834 | Achelous | |
| Portunus guaymasensis | 1966 | Achelous | |
| Portunus guinotae | 1961 | Xiphonectes | |
| Portunus hainanensis | 1986 | Xiphonectes | |
| Portunus hastatoides | 1798 | Xiphonectes | |
| Portunus hastatus | 1767 | Portunus | |
| Portunus inaequalis | 1881 | Portunus | |
| Portunus innominatus | 1909 | Lupocycloporus | |
| Portunus iranjae | 1962 | Xiphonectes | |
| Portunus iridescens | 1894 | Achelous | |
| Portunus isolamargaritensis | 1968 | Achelous | |
| Portunus laevis | 1861 | Lupocycloporus | |
| Portunus latibrachium | 1906 | Xiphonectes | |
| Portunus lecromi | 1996 | Monomia | |
| Portunus longispinosus | 1852 | Xiphonectes | |
| Portunus macrophthalmus | 1906 | Xiphonectes | |
| Portunus madagascariensis | 1877 | Portunus | |
| Portunus mariei | 1957 | Xiphonectes | |
| Portunus mauricianus | 1942 | Portunus | |
| Portunus minimus | 1898 | Portunus | |
| Portunus minutus | 1937 | Lupocycloporus | |
| Portunus mokyevskii | 1970 | Portunus | |
| Portunus octodentatus | 1938 | Achelous | |
| Portunus orbicularis | 1880 | Achelous | |
| Portunus orbitosinus | 1911 | Achelous | |
| Portunus ordwayi | 1860 | Achelous | |
| Portunus paralatibrachium | 2002 | Xiphonectes | |
| Portunus pelagicus | 1758 | Portunus | |
| Portunus petreus | 1899 | Monomia | |
| Portunus ponticus | 1798 | Monomia | |
| Portunus pseudoargentatus | 1961 | Monomia | |
| Portunus pseudohastatoides | 2006 | Xiphonectes | |
| Portunus pseudotenuipes | 1999 | Xiphonectes | |
| Portunus pubescens | 1852 | Portunus | |
| Portunus pulchricristatus | 1931 | Xiphonectes | |
| Portunus reticulatus | 1799 | Portunus | |
| Portunus reufiarcus | 1987 | Portunus | |
| Portunus rubromarginatus | 1900 | Monomia | |
| Portunus rufiremus | 1959 | Portunus | |
| Portunus rugosus | 1861 | Xiphonectes | |
| Portunus samoensis | 1939 | Monomia | |
| Portunus sanguinolentus | 1783 | Portunus | |
| Portunus sayi | 1850 | Portunus | |
| Portunus sebae | 1834 | Achelous | |
| Portunus segnis | 1775 | Portunus | |
| Portunus serratifrons | 1865 | Portunus | |
| Portunus sinusodactylus | 1967 | Lupocycloporus | |
| Portunus spinicarpus | 1871 | Achelous | |
| Portunus spiniferus | 1967 | Xiphonectes | |
| Portunus spinimanus | 1819 | Achelous | |
| Portunus spinipes | 1886 | Xiphonectes | |
| Portunus stanfordi | 1902 | Achelous | |
| Portunus stephensoni | 1981 | Xiphonectes | |
| Portunus suborbicularis | 1975 | Achelous | |
| Portunus tenuicaudatus | 1961 | Xiphonectes | |
| Portunus tenuipes | 1835 | Xiphonectes | |
| Portunus tridentatus | 1979 | Xiphonectes | |
| Portunus trilobatus | 1972 | Xiphonectes | |
| Portunus trituberculatus | 1876 | Portunus | |
| Portunus tuberculatus | 1860 | Achelous | |
| Portunus tuberculosus | 1861 | Xiphonectes | |
| Portunus tweediei | 1937 | Xiphonectes | |
| Portunus ventralis | 1879 | Portunus | |
| Portunus wilsoni | 1981 | Lupocycloporus | |
| Portunus xantusii | 1860 | Portunus | |
| Portunus yoronensis | 1974 | Achelous |