• Acetabularia acetabulum (Linnaeus) P.C. Silva, 1952: fertilisation in the water column
• Acetabularia caliculus J.V.Lamouroux, 1824: fertilisation in the water column
• Acetabularia chiavonica Squinabol, 1902 †: fertilisation in the water column
• Acetabularia crenulata J.V. Lamouroux, 1816: fertilisation in the water column
• Acetabularia crenulata J.V.Lamouroux, 1816: fertilisation in the water column
• Acetabularia dentata Solms-Laubach, 1895: fertilisation in the water column
• Acetabularia dentata Solms-Laubach, 1895: fertilisation in the water column
• Acetabularia farlowii Solms-Laubach, 1895: fertilisation in the water column
• Acetabularia farlowii Solms-Laubach, 1895: fertilisation in the water column
• Acetabularia haemmerlingii H.G.Schweiger & Berger, 1975: fertilisation in the water column
• Acetabularia jalakanyakae Sani, Madhu, R.K.Kohli, K.Gupta & Bast, 2021: fertilisation in the water column
• Acetabularia kilneri J.Agardh, 1887: fertilisation in the water column
• Acetabularia major G.Martens, 1866: fertilisation in the water column
• Acetabularia moldavica Barattolo, Ionesi & Ţibuleac, 2019 †: fertilisation in the water column
• Acetabularia peniculus (R.Brown ex Turner) Solms-Laubach, 1895: fertilisation in the water column
• Acetabularia ryukyuensis Okamura & Yamada, 1932: fertilisation in the water column
• Acetabularia schenckii K. Möbius, 1889: fertilisation in the water column
• Acetabularia schenckii Möbius, 1889: fertilisation in the water column
• Acinetospora asiatica Yaegashi, Yamagishi & Kogame, 2015: fertilisation in the water column
• Acinetospora crinita (Carmichael) Sauvageau, 1899: fertilisation in the water column
• Acinetospora filamentosa (Noda) Yaegashi, Uwai & Kogame, 2015: fertilisation in the water column
• Acinetospora nicholsoniae Hollenberg, 1971: fertilisation in the water column
• Acrosiphonia arcta (Dillwyn) Gain, 1912: fertilisation in the water column
• Acrosiphonia coalita (Ruprecht) Scagel, Garbary, Golden & M.W.Hawkes, 1986: fertilisation in the water column
• Acrosiphonia congregata (Agardh) Kjellman: fertilisation in the water column
• Acrosiphonia duriuscula (Ruprecht) Yendo, 1916: fertilisation in the water column
• Acrosiphonia effusa Kjellman, 1893: fertilisation in the water column
• Acrosiphonia flabelliformis Jónsson: fertilisation in the water column
• Acrosiphonia flaccida Kjellman: fertilisation in the water column
• Acrosiphonia flagellata Kjellman, 1893: fertilisation in the water column
• Acrosiphonia grandis Kjelmann, 1893: fertilisation in the water column
• Acrosiphonia hemisphaerica Kjellman, 1893: fertilisation in the water column
• Acrosiphonia heterocladia (Sakai) K.L.Vinogradova, 1979: fertilisation in the water column
• Acrosiphonia incurva Kjellman, 1893: fertilisation in the water column
• Acrosiphonia minima (Fosl.) Kjellman: fertilisation in the water column
• Acrosiphonia orientalis (J.Agardh) P.C.Silva, 1996: fertilisation in the water column
• Acrosiphonia penicilliformis (Foslie) Kjellman, 1893: fertilisation in the water column
• Acrosiphonia saxatilis (Ruprecht) K.L.Vinogradova, 1979: fertilisation in the water column
• Acrosiphonia setacea Kjellman: fertilisation in the water column
• Acrosiphonia sonderi (Kützing) Kornmann, 1962: fertilisation in the water column
• Acrosiphonia spinescens (Kützing) Kjellman, 1893: fertilisation in the water column
• Acrosiphonia stolonifera Kjellman, 1893: fertilisation in the water column
• Alaria angusta Kjellman, 1889: fertilisation in the water column
• Alaria cordata Tilden, 1898: fertilisation in the water column
• Alaria costata Fallis: fertilisation in the water column
• Alaria crassifolia Kjellman, 1885: fertilisation in the water column
• Alaria crispa Kjellman, 1889: fertilisation in the water column
• Alaria dolichorachis: fertilisation in the water column
• Alaria elliptica Kjellman, 1883: fertilisation in the water column
• Alaria flagellaris Strömfelt, 1886: fertilisation in the water column
• Alaria fragilis De A.Saunders, 1901: fertilisation in the water column
• Alaria longipes (Ruprecht) De Toni, 1895: fertilisation in the water column
• Alaria macrophylla Miyabe, 1902: fertilisation in the water column
• Alaria marginata Postels & Ruprecht, 1840: fertilisation in the water column
• Alaria musifolia (De la Pylaie) J.Agardh, 1872: fertilisation in the water column
• Alaria oblonga Kjellman, 1883: fertilisation in the water column
• Alaria ochotensis Yendo, 1919: fertilisation in the water column
• Alaria paradisea (Miyabe & Nagai) Widdowson, 1972: fertilisation in the water column
• Alaria praelonga Kjellman, 1889: fertilisation in the water column
• Alaria pylaiei (Bory) Greville, 1830: fertilisation in the water column
• Alaria remotifolia (De la Pylaie) Widdowson nom.prov.: fertilisation in the water column
• Alaria striata J.Agardh ineditae: fertilisation in the water column
• Anadyomene cladophoroides (W.J.Gilbert) Guiry & A.R.Sherwood, 2023: fertilisation in the water column
• Anadyomene crispa Chevallier: fertilisation in the water column
• Anadyomene eseptata Gilbert, 1961: fertilisation in the water column
• Anadyomene gigantodictyon M.M.Littler & D.S.Littler, 2012: fertilisation in the water column
• Anadyomene howei D.S.Littler & Littler, 1991: fertilisation in the water column
• Anadyomene lacerata D.S.Littler & Littler, 1991: fertilisation in the water column
• Anadyomene leclancheri Decaisne, 1844: fertilisation in the water column
• Anadyomene lenormandii J.E.Gray: fertilisation in the water column
• Anadyomene linkiana D.S.Littler & M.M.Littler, 1991: fertilisation in the water column
• Anadyomene menziesii (J.E.Gray) J.Agardh, 1887: fertilisation in the water column
• Anadyomene muelleri Sonder: fertilisation in the water column
• Anadyomene pavonina (J.Agardh) Wille, 1910: fertilisation in the water column
• Anadyomene plicata C.Agardh, 1823: fertilisation in the water column
• Anadyomene reticulata Askenasy, 1888: fertilisation in the water column
• Anadyomene rhizoidifera A.B.Joly & Pereira, 1973: fertilisation in the water column
• Anadyomene saldanhae A.B.Joly & E.C.Oliveira, 1969: fertilisation in the water column
• Anadyomene stellata (Wulfen) C.Agardh, 1823: fertilisation in the water column
• Anadyomene wrightii Harvey ex J.E.Gray, 1866: fertilisation in the water column
• Ascophyllum nodosum (Linnaeus) Le Jolis, 1863: fertilisation in the water column
• Asperococcus bullosus J.V.Lamouroux, 1813: fertilisation in the water column
• Asperococcus cystosirae (Ruprecht) Zanardini: fertilisation in the water column
• Asperococcus ensiformis (Delle Chiaje) M.J.Wynne, 2003: fertilisation in the water column
• Asperococcus fistulosus (Hudson) W.J.Hooker, 1833: fertilisation in the water column
• Asperococcus fragilis (J.Agardh) Zanardini: fertilisation in the water column
• Asperococcus norvegicus Kylin, 1910: fertilisation in the water column
• Asperococcus scaber Kuckuck, 1899: fertilisation in the water column
• Asperococcus tortilis Suhr, 1836: fertilisation in the water column
• Batophora occidentalis (Harvey) S.Berger & Kaever ex M.J.Wynne, 1998: fertilisation in the water column
• Batophora oerstedii J.Agardh, 1854: fertilisation in the water column
• Bifurcaria bifurcata R.Ross, 1958: fertilisation in the water column
• Bifurcaria palaeobifurcata (Givulescu) Molinari & Guiry, 2021 †: fertilisation in the water column
• Bolbocoleon jolyi Yamaguishi-Tomita, 1970: fertilisation in the water column
• Bolbocoleon piliferum Pringsheim, 1862: fertilisation in the water column
• Boodlea coacta (Dickie) G.Murray & De Toni, 1889: fertilisation in the water column
• Boodlea composita (Harvey) F.Brand, 1904: fertilisation in the water column
• Boodlea montagnei (Harvey ex J.E.Gray) Egerod, 1952: fertilisation in the water column
• Boodlea struveoides M.Howe, 1918: fertilisation in the water column
• Boodlea vanbosseae Reinbold, 1905: fertilisation in the water column