• Aaptos aaptos (Schmidt, 1864)
• Aaptos papillata (Keller, 1880)
• Acanthancora clavatancora Topsent, 1927 accepted as Pseudohalichondria clavatancora (Topsent, 1927)
• Acanthancora schmidti (Topsent, 1898)
• Acanthella acuta Schmidt, 1862
• Acanthella annulata Sarà, 1958
• Acanthella erecta (Carter, 1876)
• Acanthella mastophora (Schmidt, 1870)
• Acanthella multiformis Vosmaer, 1885
• Acanthella obtusa Schmidt, 1862 accepted as Dictyonella obtusa (Schmidt, 1862)
• Acantheurypon pilosella (Topsent, 1904)
• Acantheurypon scabiosum Topsent, 1927 accepted as Eurypon scabiosum (Topsent, 1927)
• Acantheurypon spinispinosum (Topsent, 1904)
• Acarnus levii (Vacelet, 1960)
• Acarnus tortilis Topsent, 1892
• Acervochalina limbata (Montagu, 1814) accepted as Chalinula limbata (Montagu, 1814)
• Acervochalina loosanoffi (Hartmann, 1958) accepted as Chalinula loosanoffi (Hartman, 1958)
• Acheliderma lemniscata Topsent, 1892 accepted as Acheliderma lemniscatum Topsent, 1892
• Acheliderma lemniscatum Topsent, 1892
• Acheliderma planum (Topsent, 1927)
• Aciculites incrustans Topsent, 1889 accepted as Desmanthus incrustans (Topsent, 1889)
• Adocia cribrata Pulitzer-Finali, 1983 accepted as Haliclona cribrata (Pulitzer-Finali, 1983)
• Adocia laevis Griessinger, 1971 accepted as Haliclona (Haliclona) jeanmicheli Van Soest & Hooper, 2020
• Adocia reptans Griessinger, 1971 accepted as Haliclona (Haliclona) massiliensis Van Soest & Hooper, 2020
• Adocia simulans (Johnston, 1842) accepted as Haliclona (Haliclona) simulans (Johnston, 1842)
• Adocia varia Sarà, 1958 accepted as Haliclona (Haliclona) michelei Van Soest & Hooper, 2020
• Adocia venata Sarà, 1960 accepted as Haliclona (Haliclona) venata (Sarà, 1960)
• Adreus fascicularis (Bowerbank, 1866)
• Aegogropila varians Gray, 1867 accepted as Mycale (Aegogropila) contarenii (Lieberkühn, 1859)
• Agelas oroides (Schmidt, 1864)
• Aka coralliphaga (Rützler, 1971) accepted as Siphonodictyon coralliphagum Rützler, 1971
• Aka infesta (Johnson, 1889) accepted as Siphonodictyon infestum (Johnson, 1899)
• Aka insidiosa (Johnson, 1899) accepted as Siphonodictyon insidiosum (Johnson, 1899)
• Aka labyrinthica (Hancock, 1849) accepted as Siphonodictyon labyrinthicum (Hancock, 1849)
• Alebion piceum Vosmaer, 1882 accepted as Iophon piceum (Vosmaer, 1882)
• Alectona millari Carter, 1879
• Alectona verticillata (Johnson, 1899)
• Alectona wallichii (Carter, 1874)
• Alloscleria tenuispinosa Topsent, 1927
• Amorphina dubia Czerniavsky, 1880 accepted as Halichondria (Halichondria) dubia (Czerniavsky, 1880)
• Amorphina fasciculata Fristedt, 1887 accepted as Hymeniacidon fasciculata (Fristedt, 1887)
• Amorphina genitrix Schmidt, 1870 accepted as Halichondria (Halichondria) genitrix (Schmidt, 1870)
• Amorphina grisea Fristedt, 1887 accepted as Halichondria (Halichondria) panicea (Pallas, 1766)
• Amorphina nodosa Fristedt, 1887 accepted as Halichondria (Eumastia) sitiens (Schmidt, 1870)
• Amorphina paciscens Schmidt, 1875 accepted as Halichondria (Halichondria) panicea (Pallas, 1766)
• Amorphina protochalina Czerniavsky, 1880 accepted as Metschnikowia tuberculata Grimm, 1877
• Amorphina renieroides Fristedt, 1887 accepted as Halichondria (Halichondria) renieroides (Fristedt, 1887)
• Amorphina velamentosa (Hansen, 1885) accepted as Halichondria (Halichondria) panicea (Pallas, 1766)
• Amorphinopsis filigrana (Schmidt, 1862)
• Amorphinopsis pallescens (Topsent, 1892)
• Amphilectus armatus (Bowerbank, 1862) accepted as Clathria (Microciona) armata (Bowerbank, 1862)
• Amphilectus columnatus (Topsent, 1890)
• Amphilectus foliata (Bowerbank, 1874) accepted as Clathria (Clathria) barleei (Bowerbank, 1866)
• Amphilectus fucorum (Esper, 1794)
• Amphilectus gerzensteini Swartschevsky, 1906 accepted as Crella gerzensteini (Swartschevsky, 1906)
• Amphilectus glaber (Brøndsted, 1924)
• Amphilectus laciniosa (Bowerbank in Norman, 1869) accepted as Clathria (Clathria) barleei (Bowerbank, 1866)
• Amphilectus lobata (Montagu, 1814) accepted as Amphilectus ovulum (Schmidt, 1870)
• Amphilectus lobatus (Montagu, 1814) accepted as Amphilectus ovulum (Schmidt, 1870)
• Amphilectus mutulus (Bowerbank, 1874) accepted as Clathria (Clathria) barleei (Bowerbank, 1866)
• Amphilectus osculosus Topsent, 1892 accepted as Phorbas osculosus (Topsent, 1892)
• Amphilectus ovulum (Schmidt, 1870)
• Amphilectus pedicellatus (Lundbeck, 1905)
• Amphilectus strongylatus Alander, 1942 accepted as Esperiopsis strongylatus (Alander, 1942)
• Amphilectus typichela (Lundbeck, 1905)
• Amphimedon chloros Ilan, Gugel & van Soest, 2004
• Anchinoe arneseni Topsent, 1913 accepted as Phorbas perarmatus (Bowerbank, 1866)
• Anchinoe fictitius (Bowerbank, 1866) accepted as Phorbas fictitius (Bowerbank, 1866)
• Anchinoe perarmatus (Bowerbank, 1866) accepted as Phorbas perarmatus (Bowerbank, 1866)
• Anchinoe roemeri Hentschel, 1929 accepted as Phorbas roemeri (Hentschel, 1929)
• Anchinoe tenacior Topsent, 1925 accepted as Phorbas tenacior (Topsent, 1925)
• Ancorina aaptos Schmidt, 1864 accepted as Aaptos aaptos (Schmidt, 1864)
• Ancorina cerebrum Schmidt, 1862
• Ancorina compacta (Hanitsch, 1889) accepted as Stryphnus ponderosus (Bowerbank, 1866)
• Ancorina hispida Bucchich, 1886 accepted as Stelletta hispida (Bucchich, 1886)
• Ancorina radix Marenzeller, 1889
• Ancorina simplicissima Schmidt, 1868 accepted as Stelletta simplicissima (Schmidt, 1868)
• Ancorina verruca Schmidt, 1862 accepted as Ancorina cerebrum Schmidt, 1862
• Ancorina wageneri (Schmidt, 1862) accepted as Ancorina cerebrum Schmidt, 1862
• Anisocrella hymedesmina Topsent, 1927
• Anisotylacanthea curvata Vacelet, 1969 accepted as Damiria curvata (Vacelet, 1969)
• Anisoxya glabra Topsent, 1898 accepted as Topsentia glabra (Topsent, 1898)
• Annulastrella ornata (Sollas, 1888)
• Annulastrella schmidti Maldonado, 2002
• Annulastrella verrucolosa (Pulitzer-Finali, 1983)
• Antares euastrum (Schmidt, 1880)
• Antho (Acarnia) arctica (Koltun, 1959)
• Antho (Acarnia) brattegardi van Soest & Stone, 1986 accepted as Antho (Jia) brattegardi van Soest & Stone, 1986
• Antho (Acarnia) circonflexa (Lévi, 1960)
• Antho (Acarnia) coriacea (Bowerbank, 1874)
• Antho (Acarnia) elegans (Ridley & Dendy, 1887)
• Antho (Acarnia) erecta (Ferrer Hernández, 1923) accepted as Antho (Plocamia) erecta (Ferrer Hernández, 1923)
• Antho (Acarnia) novizelanica (Ridley & Duncan, 1881) accepted as Antho (Plocamia) novizelanica (Ridley & Duncan, 1881)
• Antho (Acarnia) signata (Topsent, 1904)
• Antho (Antho) arcitenens (Topsent, 1892)
• Antho (Antho) dichotoma (Linnaeus, 1767)
• Antho (Antho) granditoxa Picton & Goodwin, 2007
• Antho (Antho) inconstans (Topsent, 1925)
• Antho (Antho) involvens (Schmidt, 1864)
• Antho (Antho) oxeifera (Ferrer-Hernandez, 1921)