• Aegagropila brownii (Dillwyn) Kützing, 1854: oligotrophic waters
• Aegagropila globulus K.Meier, 1927: oligotrophic waters
• Aegagropila kannoi Tokida, 1954: oligotrophic waters
• Aegagropila montagneana (Kützing) Kützing, 1854: oligotrophic waters
• Arthrocladia villosa (Hudson) Duby, 1830: oligotrophic waters
• Battersia arctica (Harvey) Draisma, Prud'homme & H.Kawai, 2010: oligotrophic waters
• Battersia mirabilis Reinke ex Batters, 1890: oligotrophic waters
• Battersia norrisii (Hollenberg) Gabrielson, Lindstrom & O'Kelly, 2012: oligotrophic waters
• Battersia plumigera (Holmes ex Hauck) Draisma, Prud'homme & H.Kawai, 2010: oligotrophic waters
• Battersia racemosa (Greville) Draisma, Prud'homme & H.Kawai, 2010: oligotrophic waters
• Capsosiphon aureus V.J.Chapman, 1952: oligotrophic waters
• Capsosiphon fulvescens (C.Agardh) Setchell & N.L.Gardner, 1920: oligotrophic waters
• Caulerpa agardhii Weber-van Bosse, 1898: oligotrophic waters
• Caulerpa alternans Womersley, 1956: oligotrophic waters
• Caulerpa ambigua Okamura, 1897: oligotrophic waters
• Caulerpa andamanensis (W.R.Taylor) Draisma, Prudhomme & Sauvage, 2014: oligotrophic waters
• Caulerpa antoensis Yamada, 1940: oligotrophic waters
• Caulerpa articulata Harvey, 1855: oligotrophic waters
• Caulerpa ashmeadii Harvey, 1858: oligotrophic waters
• Caulerpa bartoniae G.Murray, 1896: oligotrophic waters
• Caulerpa bikinensis W.R.Taylor, 1950: oligotrophic waters
• Caulerpa biserrulata Sonder, 1871: oligotrophic waters
• Caulerpa brachypus Harvey, 1860: oligotrophic waters
• Caulerpa brownii (C.Agardh) Endlicher, 1843: oligotrophic waters
• Caulerpa buginensis E.Verheij & Prud'homme van Reine, 1993: oligotrophic waters
• Caulerpa cactoides (Turner) C.Agardh, 1817: oligotrophic waters
• Caulerpa carruthersii G.Murray, 1893 †: oligotrophic waters
• Caulerpa chamnitzia: oligotrophic waters
• Caulerpa chemnitzia (Esper) J.V.Lamouroux, 1809: oligotrophic waters
• Caulerpa cliftonii Harvey, 1863: oligotrophic waters
• Caulerpa constricta I.R.Price, J.M.Huisman & M.A.Borowitzka, 1998: oligotrophic waters
• Caulerpa coppejansii G.Belton & Prud'homme, 2019: oligotrophic waters
• Caulerpa corynephora Montagne, 1842: oligotrophic waters
• Caulerpa crispata (Harvey) G.Belton & Gurgel, 2019: oligotrophic waters
• Caulerpa cupressoides (Vahl) C.Agardh, 1817: oligotrophic waters
• Caulerpa cylindracea Sonder, 1845: oligotrophic waters
• Caulerpa denticulata Decaisne, 1841: oligotrophic waters
• Caulerpa dichotoma Svedelius, 1906: oligotrophic waters
• Caulerpa diligulata Kraft & A.J.K.Millar, 2000: oligotrophic waters
• Caulerpa ellistoniae Womersley, 1955: oligotrophic waters
• Caulerpa elongata Weber Bosse, 1898: oligotrophic waters
• Caulerpa falcifolia Harvey & Bailey, 1851: oligotrophic waters
• Caulerpa faridii Nizamuddin, 1964: oligotrophic waters
• Caulerpa fastigiata Montagne, 1837: oligotrophic waters
• Caulerpa fergusonii G.Murray, 1891: oligotrophic waters
• Caulerpa filicoides Yamada, 1936: oligotrophic waters
• Caulerpa filiformis (Suhr) Hering, 1841: oligotrophic waters
• Caulerpa flagelliformis: oligotrophic waters
• Caulerpa flexilis J.V.Lamouroux ex C.Agardh, 1823: oligotrophic waters
• Caulerpa floridana W.R.Taylor, 1960: oligotrophic waters
• Caulerpa freycinettii: oligotrophic waters
• Caulerpa geminata Harvey, 1855: oligotrophic waters
• Caulerpa gracilis (Zan.) Web. V. B.: oligotrophic waters
• Caulerpa hedleyi Weber-van Bosse, 1910: oligotrophic waters
• Caulerpa heterophylla I.R.Price, J.M.Huisman & M.A.Borowitzka, 1998: oligotrophic waters
• Caulerpa hodgkinsoniae J.Agardh, 1887: oligotrophic waters
• Caulerpa holmesiana G.Murray, 1891: oligotrophic waters
• Caulerpa integerrima (Zanardini) M.J.Wynne, Verbruggen & D.L.Angel, 2009: oligotrophic waters
• Caulerpa juniperoides J.Agardh, 1873: oligotrophic waters
• Caulerpa kempfii A.B.Joly & S.M.B.Pereira, 1975: oligotrophic waters
• Caulerpa laetivirens: oligotrophic waters
• Caulerpa lagara Carruthers, Walker & Huisman, 1993: oligotrophic waters
• Caulerpa lamourouxii (Turner) C.Agardh, 1817: oligotrophic waters
• Caulerpa lanuginosa J.Agardh, 1873: oligotrophic waters
• Caulerpa lentillifera J.Agardh, 1837: oligotrophic waters
• Caulerpa lessonii Bory de Saint-Vincent, 1828: oligotrophic waters
• Caulerpa longifolia C.Agardh, 1823: oligotrophic waters
• Caulerpa lucasii Prud'homme, Draisma & G.Belton, 2019: oligotrophic waters
• Caulerpa macra (Weber-van Bosse) Draisma & Prud'homme, 2014: oligotrophic waters
• Caulerpa macrodisca Decaisne, 1842: oligotrophic waters
• Caulerpa manorensis Nizamuddin, 1964: oligotrophic waters
• Caulerpa matsueana Yamada, 1940: oligotrophic waters
• Caulerpa megadisca G.S.Belton & C.F.D.Gurgel, 2014: oligotrophic waters
• Caulerpa mexicana Sonder ex Kützing, 1849: oligotrophic waters
• Caulerpa microphysa (Weber Bosse) Feldmann, 1955: oligotrophic waters
• Caulerpa muelleri Sonder, 1853: oligotrophic waters
• Caulerpa murrayi Weber Bosse, 1898: oligotrophic waters
• Caulerpa nummularia Harvey ex J.Agardh, 1873: oligotrophic waters
• Caulerpa obscura Sonder, 1845: oligotrophic waters
• Caulerpa occidentalis (J. Ag.) Boergs.: oligotrophic waters
• Caulerpa okamurae Weber Bosse, 1897: oligotrophic waters
• Caulerpa oligophylla Montagne, 1842: oligotrophic waters
• Caulerpa ollivieri Dostál, 1929: oligotrophic waters
• Caulerpa opposita Coppejans & Meinesz, 1988: oligotrophic waters
• Caulerpa papillosa J.Agardh, 1873: oligotrophic waters
• Caulerpa parvifolia Harvey, 1860: oligotrophic waters
• Caulerpa parvula Svedelius, 1906: oligotrophic waters
• Caulerpa paspaloides (Bory de Saint-Vincent) Greville, 1830: oligotrophic waters
• Caulerpa pennata J.Agardh, 1873: oligotrophic waters
• Caulerpa pinnata C.Agardh, 1817: oligotrophic waters
• Caulerpa plumulifera Zanardini, 1878: oligotrophic waters
• Caulerpa prolifera (Forsskål) J.V.Lamouroux, 1809: oligotrophic waters
• Caulerpa pusilla (Kützing) J.Agardh, 1873: oligotrophic waters
• Caulerpa qureshii Nizamuddin, 1964: oligotrophic waters
• Caulerpa racemosa (Forsskål) J.Agardh, 1873: oligotrophic waters
• Caulerpa remotifolia Sonder, 1853: oligotrophic waters
• Caulerpa reniformis G.R.South & Skelton, 2003: oligotrophic waters
• Caulerpa reyesii Meñez & Calumpong, 1982: oligotrophic waters
• Caulerpa scalpelliformis (R.Brown ex Turner) C.Agardh, 1817: oligotrophic waters
• Caulerpa sedoides C.Agardh, 1817: oligotrophic waters