| Acanthephyridae Dana, 1852 | | 91 | Species | Taxom |
| Acetidae Vereshchaka, 2017 | | 20 | Species | Taxom |
| Acidopsidae Stevcic, 2005 | | 15 | Species | Taxom |
| Aegeridae Burkenroad, 1963 | | 8 | Species | Taxom |
| Aeglidae Dana, 1852 | | 97 | Species | Taxom |
| Aethridae Dana, 1851 | | 38 | Species | Taxom |
| Agostocarididae Hart & Manning, 1986 | | 4 | Species | Taxom |
| Albuneidae Stimpson, 1858 | Mole crabs | 78 | Species | Taxom |
| Alpheidae Rafinesque, 1815 | Alpheid shrimp | 856 | Species | Taxom |
| Alvinocarididae Christoffersen, 1986 | | 31 | Species | Taxom |
| Amphionididae Holthuis, 1955 | | 1 | Species | Taxom |
| Anchialocarididae Mejía-Ortíz,..., 2017 | | 1 | Species | Taxom |
| Aphanodactylidae Ahyong & Ng, 2009 | | 4 | Species | Taxom |
| Aristeidae Wood-Mason, 1891 | Gamba prawns | 53 | Species | Taxom |
| Astacidae Latreille, 1802 | Astacid crayfishes | 51 | Species | Taxom |
| Atelecyclidae Ortmann, 1893 | Horse crabs | 42 | Species | Taxom |
| Atyidae De Haan, 1849 | Atyid shrimps | 645 | Species | Taxom |
| Axiidae Huxley, 1879 | Lobster shrimps | 249 | Species | Taxom |
| Barbouriidae Christoffersen, 1987 | | 13 | Species | Taxom |
| Basinotopidae Karasawa, Sc..., 2011 | | 2 | Species | Taxom |
| Bathypalaemonellidae de Saint Lau..., 1985 | | 12 | Species | Taxom |
| Belliidae Dana, 1852 | | 9 | Species | Taxom |
| Benthesicymidae Wood-Mason, 1891 | Benthesicymid shrimps | 54 | Species | Taxom |
| Bentheuphausiidae Colosi, 1917 | | 1 | Species | Taxom |
| Blepharipodidae Boyko, 2002 | Spiny sand crabs | 10 | Species | Taxom |
| Bresiliidae Calman, 1896 | | 10 | Species | Taxom |
| Bucculentidae Schweitzer &..., 2009 | | 2 | Species | Taxom |
| Bythocarididae Christoffersen, 1987 | | 20 | Species | Taxom |
| Bythograeidae Williams, 1980 | | 14 | Species | Taxom |
| Calappidae Milne-Edwards, 1837 | Box Crab | 155 | Species | Taxom |
| Callianassidae Dana, 1852 | Burrowing Ghost Shrimps | 501 | Species | Taxom |
| Callianideidae Kossmann, 1880 | | 17 | Species | Taxom |
| Callichiridae Manning & Fe..., 1991 | | 5 | Species | Taxom |
| Camarocarcinidae Feldmann & al., 2007 | | 3 | Species | Taxom |
| Cambaridae Hobbs, 1942 | Cambarid crayfishes | 622 | Species | Taxom |
| Camptandriidae Stimpson, 1858 | | 65 | Species | Taxom |
| Campylonotidae Sollaud, 1913 | | 6 | Species | Taxom |
| Cancridae Latreille, 1802 | Edible crabs | 282 | Species | Taxom |
| Cancrinidae Beurlen, 1930 | | 1 | Species | Taxom |
| Carcineretidae Beurlen, 1930 | | 6 | Species | Taxom |
| Carinocarcinoididae | | 2 | Species | Taxom |
| Carpiliidae Ortmann, 1893 | Coral crabs | 57 | Species | Taxom |
| Carpopenaeidae Garassino, 1994 | | 4 | Species | Taxom |
| Cenomanocarcinidae Guinot & al., 2008 | | 11 | Species | Taxom |
| Chasmocarcinidae Serène, 1964 | | 79 | Species | Taxom |
| Cheiragonidae Ortmann, 1893 | Helmet crabs | 10 | Species | Taxom |
| Chilenophoberidae Tshudy & Bab..., 1997 | | 1 | Species | Taxom |
| Chirostylidae Ortmann, 1892 | | 402 | Species | Taxom |
| Chlorotocellidae Komai, Chan ..., 2019 | | 8 | Species | Taxom |
| Christmaplacidae Naruse & Ng, 2014 | | 2 | Species | Taxom |
| Clytiopsidae Beurlen, 1927 | | 1 | Species | Taxom |
| Coenobitidae Dana, 1851 | Land hermit crabs | 39 | Species | Taxom |
| Coleiidae Van Straelen, 1924 | | 13 | Species | Taxom |
| Componocancridae Feldmann & S..., 2008 | | 1 | Species | Taxom |
| Conleyidae Stevcic, 2005 | | 1 | Species | Taxom |
| Coralaxiidae Sakai & de S..., 1989 | | 4 | Species | Taxom |
| Corystidae Samouelle, 1819 | | 20 | Species | Taxom |
| Crangonidae Haworth, 1825 | Crangonid Shrimp | 342 | Species | Taxom |
| Crossotonotidae Moosa & Serène, 1981 | | 1 | Species | Taxom |
| Cryptochiridae Paulson, 1875 | Coral gall crabs | 72 | Species | Taxom |
| Ctenochelidae Manning & Fe..., 1991 | | 1 | Species | Taxom |
| Cyclodorippidae Ortmann, 1892 | | 54 | Species | Taxom |
| Cymonomidae Bouvier, 1897 | | 41 | Species | Taxom |
| Dacryopilumnidae Serène, 1984 | | 2 | Species | Taxom |
| Dairidae Ng & Rodriguez, 1986 | | 13 | Species | Taxom |
| Dakoticancridae Rathbun, 1917 | | 6 | Species | Taxom |
| Desmocarididae Borradaile, 1915 | | 4 | Species | Taxom |
| Diaulacidae Wright & Col..., 1972 | | 4 | Species | Taxom |
| Diogenidae Ortmann, 1892 | Left-handed hermit crabs | 585 | Species | Taxom |
| Disciadidae Rathbun, 1902 | | 11 | Species | Taxom |
| Domeciidae Ortmann, 1893 | | 6 | Species | Taxom |
| Dorippidae MacLeay, 1838 | Demon-faced crabs | 147 | Species | Taxom |
| Dotillidae Stimpson, 1858 | | 65 | Species | Taxom |
| Dromiidae De Haan, 1833 | Sponge crabs | 251 | Species | Taxom |
| Dynomenidae Ortmann, 1892 | | 50 | Species | Taxom |
| Ectaesthesiidae Ng, Ahyong &..., 2023 | | 1 | Species | Taxom |
| Enoplometopidae de Saint Lau..., 1988 | Reef lobsters | 15 | Species | Taxom |
| Eocarcinidae Withers, 1932 | | 1 | Species | Taxom |
| Epialtidae MacLeay, 1838 | Kelp Crabs | 540 | Species | Taxom |
| Eriphiidae MacLeay, 1838 | | 3 | Species | Taxom |
| Erymidae Van Straelen, 1924 | | 77 | Species | Taxom |
| Eryonidae De Haan, 1841 | | 24 | Species | Taxom |
| Ethusidae Guinot, 1977 | | 3 | Species | Taxom |
| Etyidae Guinot & Tav..., 2001 | | 14 | Species | Taxom |
| Etyiidae (Guinot & Tav..., 2001) | | 3 | Species | Taxom |
| Eugonatonotidae Chace, 1937 | | 3 | Species | Taxom |
| Eumunididae A. Milne Edw..., 1900 | | 48 | Species | Taxom |
| Euphausiidae Milne-Edwards, 1837 | | 124 | Species | Taxom |
| Euryplacidae Stimpson, 1871 | | 29 | Species | Taxom |
| Eurypodiidae MacLeay, 1838 | | 3 | Species | Taxom |
| Euryrhynchidae Holthuis, 1950 | | 12 | Species | Taxom |
| Feldmanniidae Schweitzer &..., 2012 | | 13 | Species | Taxom |
| Galatheidae Samouelle, 1819 | Squat lobsters | 307 | Species | Taxom |
| Galenidae Alcock, 1898 | | 14 | Species | Taxom |
| Gecarcinidae MacLeay, 1838 | Land crabs | 52 | Species | Taxom |
| Gecarcinucidae Rathbun, 1904 | | 41 | Species | Taxom |
| Geryonidae Colosi, 1923 | Deepsea crabs | 58 | Species | Taxom |
| Glaessneropsidae Patrulius, 1959 | | 11 | Species | Taxom |
| Glypheidae Zittel, 1885 | | 73 | Species | Taxom |
| Glyphocrangonidae Smith, 1884 | Armored shrimp | 91 | Species | Taxom |
| Glyptograpsidae Schubart, C..., 2002 | | 4 | Species | Taxom |
| Goneplacidae MacLeay, 1838 | Angular crabs | 204 | Species | Taxom |
| Goniodromitidae Beurlen, 1932 | | 30 | Species | Taxom |
| Gourretiidae (Sakai, 1999) | | 1 | Species | Taxom |
| Grapsidae MacLeay, 1838 | Marsh crabs | 129 | Species | Taxom |
| Hapalogastridae Brandt, 1850 | | 11 | Species | Taxom |
| Heloeciidae H. Milne-Edw..., 1852 | | 1 | Species | Taxom |
| Hepatidae Stimpson, 1871 | | 29 | Species | Taxom |
| Hexapodidae Miers, 1886 | | 46 | Species | Taxom |
| Hippidae Latreille, 1825 | Mole Crabs | 52 | Species | Taxom |
| Hippolytidae Dana, 1852 | Anemone shrimp | 226 | Species | Taxom |
| Homolidae De Haan, 1839 | Carrier crabs | 129 | Species | Taxom |
| Homolodromiidae Alcock, 1899 | | 30 | Species | Taxom |
| Hymenosomatidae MacLeay, 1838 | | 137 | Species | Taxom |
| Hypothalassiidae Karasawa & S..., 2006 | Champagne crabs | 3 | Species | Taxom |
| Ibericancridae Artal & Guin..., 2008 | | 1 | Species | Taxom |
| Inachidae MacLeay, 1838 | | 260 | Species | Taxom |
| Inachoididae Dana, 1851 | | 54 | Species | Taxom |
| Iphiculidae Alcock, 1896 | | 14 | Species | Taxom |
| Kakaducarididae Bruce, 1993 | | 1 | Species | Taxom |
| Kiwaidae Macpherson, ..., 2006 | Yeti crabs | 2 | Species | Taxom |
| Konidromitidae | | 1 | Species | Taxom |
| Laomediidae Borradaile, 1903 | | 29 | Species | Taxom |
| Latreilliidae Stimpson, 1858 | Longleg crabs | 11 | Species | Taxom |
| Lecythocaridae Schweitzer &..., 2009 | | 3 | Species | Taxom |
| Leptograpsodidae Guinot, Ng &..., 2018 | | 1 | Species | Taxom |
| Leucosiidae Samouelle, 1819 | Nut crabs | 669 | Species | Taxom |
| Linnaeoxanthidae Stevcic, 2005 | | 1 | Species | Taxom |
| Lipkiidae Burukovsky, 2012 | | 1 | Species | Taxom |
| Lithodidae Samouelle, 1819 | King crab | 142 | Species | Taxom |
| Lithodidea Stimpson, 1862 | | 2 | Species | Taxom |
| Lithophylacidae Straelen, 1936 | | 1 | Species | Taxom |
| Litocheiridae ?tev?i?, 2005 | | 13 | Species | Taxom |
| Litogastroidae (Karasawa, Sc..., 2013) | | 2 | Species | Taxom |
| Lomisidae Bouvier, 1895 | | 2 | Species | Taxom |
| Longodromitidae Schweitzer &..., 2009 | | 22 | Species | Taxom |
| Longusorbiidae Karasawa, Sc..., 2008 | | 5 | Species | Taxom |
| Luciferidae De Haan, 1849 | | 13 | Species | Taxom |
| Lyreididae Guinot, 1993 | | 1 | Species | Taxom |
| Lysmatidae Dana, 1852 | | 59 | Species | Taxom |
| Macrocheiridae Dana, 1851 | | 5 | Species | Taxom |
| Macromaxillocarididae Alvarez, Ili..., 2006 | | 1 | Species | Taxom |
| Macrophthalmidae Dana, 1851 | | 105 | Species | Taxom |
| Macropipidae Rafinesque, 1815 | Swimming crabs | 1 | Species | Taxom |
| Majidae Samouelle, 1819 | Spider crab | 367 | Species | Taxom |
| Marocarcinidae Guinot, De A..., 2008 | | 1 | Species | Taxom |
| Martinocarcinidae | | 0 | Species | Taxom |
| Mathildellidae Karasawa & Kato, 2003 | | 26 | Species | Taxom |
| Matutidae De Haan, 1835 | | 44 | Species | Taxom |
| Mecochiridae Van Straelen, 1924 | | 31 | Species | Taxom |
| Menippidae Ortmann, 1893 | Stone crabs | 72 | Species | Taxom |
| Merguiidae Christoffersen, 1990 | | 2 | Species | Taxom |
| Micheleidae Sakai, 1992 | | 33 | Species | Taxom |
| Mictyridae Dana, 1851 | | 7 | Species | Taxom |
| Mithracidae Balss, 1929 | | 112 | Species | Taxom |
| Mithracitidae Stevcic, 2005 | | 2 | Species | Taxom |
| Munididae Ahyong, Baba..., 2010 | | 487 | Species | Taxom |
| Munidopsidae Whiteaves, 1874 | | 290 | Species | Taxom |
| Nanocassiopidae Števčić, 2013 | | 6 | Species | Taxom |
| Necrocarcinidae Föster, 1968 | | 25 | Species | Taxom |
| Nematocarcinidae Smith, 1884 | | 46 | Species | Taxom |
| Nephropidae Dana, 1852 | Clawed Lobster | 145 | Species | Taxom |
| Nodoprosopidae Schweitzer &..., 2009 | | 8 | Species | Taxom |
| Ocypodidae Rafinesque, 1815 | Fiddler crabs | 348 | Species | Taxom |
| Ogyrididae Holthuis, 1955 | Long-eyed shrimps | 18 | Species | Taxom |
| Oplophoridae Dana, 1852 | Deepsea shrimps | 32 | Species | Taxom |
| Oregoniidae Garth, 1958 | | 35 | Species | Taxom |
| Orithyiidae Dana, 1853 | | 4 | Species | Taxom |
| Oziidae Dana, 1851 | | 24 | Species | Taxom |
| Paguridae Latreille, 1802 | Hermit Crabs | 775 | Species | Taxom |
| Palaemonidae Rafinesque, 1815 | Palaemonid Shrimps | 1563 | Species | Taxom |
| Palaeocorystidae Lorenthey & ..., 1929 | | 4 | Species | Taxom |
| Palaeopalaemonidae Rafinesque, 1815 | | 1 | Species | Taxom |
| Palaeopentachelidae | | 2 | Species | Taxom |
| Palaeoxanthopsidae Schweitzer, 2003 | | 2 | Species | Taxom |
| Paleoxanthopsidae Schweitzer, 2003 | | 5 | Species | Taxom |
| Palicidae Bouvier, 1898 | Stilt crabs | 83 | Species | Taxom |
| Palinuridae Latreille, 1802 | Crawfish | 139 | Species | Taxom |
| Pandalidae Haworth, 1825 | Pandalid shrimp | 266 | Species | Taxom |
| Panopeidae Ortmann, 1893 | Mud crabs | 161 | Species | Taxom |
| Parapaguridae S. I. Smith, 1882 | Deepwater hermit crabs | 145 | Species | Taxom |
| Parapinnixidae Števčić, 2005 | | 4 | Species | Taxom |
| Parapylochelidae Fraaije, Klo..., 2012 | | 4 | Species | Taxom |
| Parastacidae Huxley, 1879 | | 251 | Species | Taxom |
| Parathelphusidae Alcock, 1910 | | 251 | Species | Taxom |
| Parthenopidae MacLeay, 1838 | Elbow crabs | 299 | Species | Taxom |
| Pasiphaeidae Dana, 1852 | Glass shrimps | 110 | Species | Taxom |
| Pemphicidae Van Straelen, 1928 | | 7 | Species | Taxom |
| Penaeidae Rafinesque, 1815 | Penaeid shrimps | 491 | Species | Taxom |
| Petalidiumidae Vereshchaka, 2017 | | 3 | Species | Taxom |
| Phyllotymolinidae Tavares, 1998 | | 4 | Species | Taxom |
| Physetocarididae Chace, 1940 | | 1 | Species | Taxom |
| Pilumnidae Samouelle, 1819 | | 529 | Species | Taxom |
| Pilumnoididae Guinot & Mac..., 1987 | | 9 | Species | Taxom |
| Pinnotheridae De Haan, 1833 | Commensal Crabs | 384 | Species | Taxom |
| Pirimelidae Alcock, 1899 | | 6 | Species | Taxom |
| Plagusiidae Dana, 1851 | | 41 | Species | Taxom |
| Planopilumnidae Serène, 1984 | | 6 | Species | Taxom |
| Platychelidae Glaessner, 1969 | | 1 | Species | Taxom |
| Platykottidae Chablais, Fe..., 2011 | | 1 | Species | Taxom |
| Platyxanthidae Guinot, 1977 | | 9 | Species | Taxom |
| Polychelidae Wood-Mason, 1874 | Blind lobsters | 83 | Species | Taxom |
| Porcellanidae Haworth, 1825 | Porcelain crab | 467 | Species | Taxom |
| Portunidae Rafinesque, 1815 | Swimming Crab | 800 | Species | Taxom |
| Potamidae Ortmann, 1896 | | 471 | Species | Taxom |
| Potamonautidae Bott, 1970 | | 150 | Species | Taxom |
| Poupiniidae Guinot, 1991 | | 3 | Species | Taxom |
| Priscinachidae | | 1 | Species | Taxom |
| Procarididae Chace & Manning, 1972 | | 7 | Species | Taxom |
| Processidae Ortmann, 1896 | Night shrimps | 83 | Species | Taxom |
| Progeryonidae Å tevÄić..., 2005 | | 3 | Species | Taxom |
| Prosopidae von Meyer, 1860 | | 23 | Species | Taxom |
| Protastacidae Albrecht, 1983 | | 1 | Species | Taxom |
| Psalidopodidae Wood-Mason, 1892 | Scissorfoot shrimps | 6 | Species | Taxom |
| Psammocarcinidae | | 1 | Species | Taxom |
| Pseudocarcinidae Ng & Davie, 2020 | | 3 | Species | Taxom |
| Pseudochelidae De Grave & M..., 2004 | | 3 | Species | Taxom |
| Pseudorhombilidae Alcock, 1900 | | 33 | Species | Taxom |
| Pseudothelphusidae Ortmann, 1893 | | 323 | Species | Taxom |
| Pseudoziidae Alcock, 1898 | | 15 | Species | Taxom |
| Pylochelidae Bate, 1888 | | 62 | Species | Taxom |
| Pylojacquesidae McLaughlin &..., 2001 | | 1 | Species | Taxom |
| Raninidae De Haan, 1839 | Frog crabs | 182 | Species | Taxom |
| Retroplumidae Gill, 1894 | | 30 | Species | Taxom |
| Retrorsichelidae Feldmann, Ts..., 1993 | | 1 | Species | Taxom |
| Rhynchocinetidae Ortmann, 1890 | Hingebeak shrimp | 38 | Species | Taxom |
| Scalopidiidae Stevcic, 2005 | | 2 | Species | Taxom |
| Schobertellidae | | 3 | Species | Taxom |
| Scyllaridae Latreille, 1825 | Shovel-nosed lobsters | 162 | Species | Taxom |
| Sergestidae Dana, 1852 | | 149 | Species | Taxom |
| Sesarmidae Dana, 1851 | | 529 | Species | Taxom |
| Sicyonellidae Vereshchaka, 2017 | | 4 | Species | Taxom |
| Sicyoniidae Ortmann, 1898 | Rock shrimps | 66 | Species | Taxom |
| Solenoceridae Wood-Mason, 1891 | Solenocerid shrimps | 120 | Species | Taxom |
| Sphaerodromiidae Guinot & Tav..., 2003 | | 1 | Species | Taxom |
| Spongicolidae von Martens, 1872 | Glass sponge shrimps | 53 | Species | Taxom |
| Stenochiridae | | 10 | Species | Taxom |
| Stenopodidae Risso, 1826 | Coral shrimps | 40 | Species | Taxom |
| Sternostylidae Baba Ahyong ..., 2018 | | 8 | Species | Taxom |
| Strahlaxiidae Poore, 1994 | | 11 | Species | Taxom |
| Stylodactylidae Bate, 1888 | | 39 | Species | Taxom |
| Tanaocheleidae Ng & P. F. C..., 2000 | | 2 | Species | Taxom |
| Tanidromitidae Schweitzer &..., 2007 | | 6 | Species | Taxom |
| Tetrachelidae BemIen, 1930 | | 1 | Species | Taxom |
| Tetraliidae Castro, Ng &..., 2004 | | 27 | Species | Taxom |
| Tetriasidae Tsang & Naruse, 2023 | | 2 | Species | Taxom |
| Thalassinidae Latreille, 1831 | Mud lobsters | 14 | Species | Taxom |
| Thiidae Dana, 1852 | | 8 | Species | Taxom |
| Thoridae Kingsley, 1878 | Anemone shrimp | 219 | Species | Taxom |
| Tithonohomolidae | | 4 | Species | Taxom |
| Trapeziidae Miers, 1886 | Coral crabs | 79 | Species | Taxom |
| Tricarinidae Feldmann & al., 2007 | | 1 | Species | Taxom |
| Trichodactylidae H. Milne-Edw..., 1835 | | 92 | Species | Taxom |
| Trichopeltariidae Tavares & Cleva, 2010 | | 1 | Species | Taxom |
| Tumidocarcinidae Schweitzer, 2005 | | 34 | Species | Taxom |
| Tychidae (Dana, 1851) | Urn crabs | 12 | Species | Taxom |
| Typhlocarididae Annandale & ..., 1913 | | 4 | Species | Taxom |
| Uncinidae Beurlen, 1928 | | 2 | Species | Taxom |
| Upogebiidae Borradaile, 1903 | Mud shrimp | 189 | Species | Taxom |
| Varunidae H. Milne-Edw..., 1853 | | 225 | Species | Taxom |
| Venipaguridae Collins, 2011 | | 1 | Species | Taxom |
| Viaiidae Artal, Van ..., 2012 | | 0 | Species | Taxom |
| Vultocinidae Ng & Manuel-..., 2007 | | 1 | Species | Taxom |
| Xanthidae MacLeay, 1838 | Mud crabs | 1082 | Species | Taxom |
| Xenograpsidae Davie, Schub..., 2007 | | 3 | Species | Taxom |
| Xenophthalmidae Stimpson, 1858 | | 6 | Species | Taxom |
| Xiphocarididae Ortmann, 1895 | | 6 | Species | Taxom |
| Zanthopsidae Vía, 1959 | | 35 | Species | Taxom |