Sycon
Sycon is een geslacht van sponsdieren uit de familie van de Sycettidae.

Soorten 
 Sycon abyssale Borojevic & raat-Kleeton, 1965
 Sycon acanthoxea (Little, 1963)
 Sycon album Tanita, 1942
 Sycon ampulla (Haeckel, 1870)
 Sycon antarcticum (Jenkin, 1908)
 Sycon arcticum (Haeckel, 1870)
 Sycon asperum (Gibson, 1886)
 Sycon australe (Jenkin, 1908)
 Sycon barbadense (Schuffner, 1877)
 Sycon boreale (Schuffner, 1877)
 Sycon brasiliense Borojevic, 1971
 Sycon calcaravis Hozawa, 1929
 Sycon caminatum Thacker, 1908
 Sycon capricorn Wörheide & Hooper, 2003
 Sycon carteri Dendy, 1893
 Sycon ciliatum (Fabricius, 1780)
 Sycon ciliatum var. spinispiculum (Carter, 1876)
 Sycon coactum (Urban, 1906)
 Sycon compactum Lambe, 1893
 Sycon cylindricum Tanita, 1942
 Sycon defendens Borojevic, 1967
 Sycon digitiforme Hozawa, 1929
 Sycon dunstervillia (Haeckel, 1872)
 Sycon eglintonense Lambe, 1900
 Sycon elegans (Bowerbank, 1845)
 Sycon ensiferum Dendy, 1893
 Sycon escanabense Duplessis & Reiswig, 2000
 Sycon faulkneri Ilan, Gugel, Galil & Janussen, 2003
 Sycon formosum (Haeckel, 1870)
 Sycon frustulosum Borojevic & Peixinho, 1976
 Sycon gelatinosum (Blainville, 1834)
 Sycon giganteum Dendy, 1893
 Sycon globulatum Hozawa, 1929
 Sycon grantioides Dendy, 1916
 Sycon helleri (Lendenfeld, 1891)
 Sycon hozawai Breitfuss, 1932
 Sycon huinayense Azevedo, Hajdu, Willenz & Klautau, 2009
 Sycon humboldti Risso
 Sycon inconspicuum (Lendenfeld, 1885)
 Sycon incrustans Breitfuss, 1898
 Sycon karajakense Breitfuss, 1897
 Sycon kerguelense Urban, 1908
 Sycon lambei Dendy & Row, 1913
 Sycon lendenfeldi Row & Hozawa, 1931
 Sycon lingua (Haeckel, 1870)
 Sycon lunulatum (Haeckel, 1872)
 Sycon luteolum Tanita, 1942
 Sycon matsushimense Tanita, 1940
 Sycon mexico Hozawa, 1940
 Sycon minutum Dendy, 1893
 Sycon misakiense Hozawa, 1929
 Sycon mundulum Lambe, 1900
 Sycon munitum Jenkin, 1908
 Sycon natalense Borojevic, 1967
 Sycon okadai Hozawa, 1929
 Sycon ornatum Kirk, 1898
 Sycon parvulum (Preiwisch, 1904)
 Sycon pedicellatum Kirk, 1911
 Sycon plumosum Tanita, 1943
 Sycon proboscideum Breitfuss, 1898
 Sycon proboscideum (Haeckel, 1870)
 Sycon protectum Lambe, 1896
 Sycon pulchrum Tanita, 1943
 Sycon quadrangulatum (Schmidt, 1868)
 Sycon ramsayi (Lendenfeld, 1885)
 Sycon raphanus Schmidt, 1862
 Sycon rotundum Tanita, 1941
 Sycon satsumense Hozawa, 1929
 Sycon scaldiense (Van Koolwijk, 1982)
 Sycon schmidti (Haeckel, 1872)
 Sycon schuffneri Dendy & Row, 1913
 Sycon setosum Schmidt, 1862
 Sycon simushirense Hozawa, 1918
 Sycon stauriferum (Preiwisch, 1904)
 Sycon subhispidum (Carter, 1886)
 Sycon sycandra (Lendenfeld, 1895)
 Sycon tabulatum (Schuffner, 1877)
 Sycon tenellum Lendenfeld, 1891
 Sycon tuba Lendenfeld, 1891
 Sycon urugamii Tanita, 1940
 Sycon verum Row & Hozawa, 1931
 Sycon vigilans Sarà & Gaino, 1971
 Sycon yatsui Hozawa, 1929

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