The following species are recognised in the genus
Tethya: • †
Tethya logani Dawson, 1857 •
Tethya magna Kirkpatrick, 1903 •
Tethya maza Selenka, 1879 •
Tethya melinka Hajdu, Desqueyroux-Faúndez, Carvalho, Lôbo-Hajdu & Willenz, 2013 •
Tethya meloni Corriero, Gadaleta & Bavestrello, 2015 •
Tethya mexicana Sarà, Gómez & Sarà, 2001 •
Tethya microstella Sarà, 1990 •
Tethya minuta Sarà, Sarà, Nickel & Brümmer, 2001 •
Tethya monstrosa (Burton, 1924) •
Tethya mortoni Bergquist & Kelly-Borges, 1991 •
Tethya multifida (Carter, 1882) •
Tethya multistella Lendenfeld, 1888 •
Tethya nicolae Ribeiro & Muricy, 2011 •
Tethya norvegica Bowerbank, 1872 •
Tethya novaecaledoniae Sarà, 1988 •
Tethya nux (Selenka, 1867) •
Tethya omanensis Sarà & Bavestrello, 1995 •
Tethya ornata Sarà, Bavestrello & Calcinai, 2000 •
Tethya orphei Sarà, 1990 •
Tethya ovum Sarà, Gómez & Sarà, 2001 •
Tethya papillosa (Thiele, 1905) •
Tethya paroxeata Sarà, Gómez & Sarà, 2001 •
Tethya parvistella (Baer, 1906) •
Tethya parvula Ribeiro & Muricy, 2011 •
Tethya pellis Bergquist & Kelly-Borges, 1991 •
Tethya peracuata (Topsent, 1918) •
Tethya popae Bergquist & Kelly-Borges, 1991 •
Tethya pulchra Sarà, 1992 •
Tethya pulitzeri Sarà & Sarà, 2004 •
Tethya robusta (Bowerbank, 1873) •
Tethya rubra Samaai & Gibbons, 2005 •
Tethya samaaii Ribeiro & Muricy, 2011 •
Tethya sarai Desqueyroux-Faúndez & van Soest, 1997 •
Tethya seychellensis (Wright, 1881) •
Tethya simi Sarà, Bavestrello & Calcinai, 2000 •
Tethya socius Sarà, Gómez & Sarà, 2001 •
Tethya solangeae Ribeiro & Muricy, 2011 •
Tethya sollasi Bergquist & Kelly-Borges, 1991 •
Tethya songakensis Kim & Sim, 2005 •
Tethya stellagrandis (Dendy, 1916) •
Tethya stellodermis Sarà & Sarà, 2004 •
Tethya stolonifera Bergquist & Kelly-Borges, 1991 •
Tethya strongylata Sarà, Bavestrello & Calcinai, 2000 •
Tethya taboga (de Laubenfels, 1936) •
Tethya tasmaniae Sarà & Sarà, 2004 •
Tethya tenuisclera Sarà & Corriero, 1994 •
Tethya topsenti Sarà, Bavestrello & Calcinai, 2000 •
Tethya uljinensis Shim & Sim, 2008 •
Tethya vacua Austin, Ott, Reiswig, Romagosa & McDaniel, 2014 •
Tethya varians Sarà & Bavestrello, 1998 •
Tethya viridis (Baer, 1906) •
Tethya wilhelma Sarà, Sarà, Nickel & Brümmer, 2001 ==References==