Sycon is a genus of calcareous sponges belonging to the family Sycettidae. These sponges are small, growing up to 7.5 cm with a length from 2.5 to 7.5 cm, and are tube-shaped and often white to cream in colour. They are known to aquarium hobbyists as "Pineapple" or "Q-Tip" sponges, and are frequent "hitchhikers" accidentally brought in.
Species
The following species are recognised in the genus Sycon:
- Sycon abyssale <small>Borojevic & raat-Kleeton, 1965</small>
- Sycon acanthoxea <small>(Little, 1963)</small>
- Sycon album <small>Tanita, 1942</small>
- Sycon ampulla <small>(Haeckel, 1870)</small>
- Sycon antarcticum <small>(Jenkin, 1908)</small>
- Sycon arcticum <small>(Haeckel, 1870)</small>
- Sycon australe <small>(Jenkin, 1908)</small>
- Sycon avus <small>Chagas & Cavalcanti, 2017</small>
- Sycon barbadense <small>(Schuffner, 1877)</small>
- Sycon bellum <small>Chagas & Cavalcanti, 2017</small>
- Sycon boreale <small>(Schuffner, 1877)</small>
- Sycon brasiliense <small>Borojevic, 1971</small>
- Sycon calcaravis <small>Hozawa, 1929</small>
- Sycon caminatum <small>Thacker, 1908</small>
- Sycon capricorn <small>Wörheide & Hooper, 2003</small>
- Sycon carteri <small>Dendy, 1893</small>
- Sycon ciliatum <small>(Fabricius, 1780)</small>
- Sycon coactum <small>(Urban, 1906)</small>
- Sycon compactum <small>Lambe, 1893</small>
- Sycon conulosum <small>Cóndor-Luján, Louzada, Hajdu & Klautau, 2018</small>
- Sycon cylindricum <small>Tanita, 1942</small>
- Sycon defendens <small>Borojevic, 1967</small>
- Sycon digitiforme <small>Hozawa, 1929</small>
- Sycon dunstervillia <small>(Haeckel, 1872)</small>
- Sycon eglintonense <small>Lambe, 1900</small>
- Sycon elegans <small>(Bowerbank, 1845)</small>
- Sycon ensiferum <small>Dendy, 1893</small>
- Sycon escanabense <small>Duplessis & Reiswig, 2000</small>
- Sycon faulkneri <small>Ilan, Gugel, Galil & Janussen, 2003</small>
- Sycon formosum <small>(Haeckel, 1870)</small>
- Sycon frustulosum <small>Borojevic & Peixinho, 1976</small>
- Sycon gelatinosum <small>(Blainville, 1834)</small>
- Sycon giganteum <small>Dendy, 1893</small>
- Sycon globulatum <small>Hozawa, 1929</small>
- Sycon grantioides <small>Dendy, 1916</small>
- Sycon helleri <small>(Lendenfeld, 1891)</small>
- Sycon hozawai <small>Breitfuss, 1932</small>
- Sycon huinayense <small>Azevedo, Hajdu, Willenz & Klautau, 2009</small>
- Sycon humboldti <small>Risso, 1826</small> type species
- Sycon inconspicuum <small>(Lendenfeld, 1885)</small>
- Sycon incrustans <small>Breitfuss, 1898</small>
- Sycon karajakense <small>Breitfuss, 1897</small>
- Sycon kerguelense <small>Urban, 1908</small>
- Sycon lambei <small>Dendy & Row, 1913</small>
- Sycon lendenfeldi <small>Row & Hozawa, 1932</small>
- Sycon lingua <small>(Haeckel, 1870)</small>
- Sycon lunulatum <small>(Haeckel, 1872)</small>
- Sycon luteolum <small>Tanita, 1942</small>
- Sycon magnapicale <small>Cóndor-Luján, Louzada, Hajdu & Klautau, 2018</small>
- Sycon matsushimense <small>Tanita, 1940</small>
- Sycon mexico <small>Hozawa, 1940</small>
- Sycon minutum <small>Dendy, 1893</small>
- Sycon misakiense <small>Hozawa, 1929</small>
- Sycon mundulum <small>Lambe, 1900</small>
- Sycon munitum <small>Jenkin, 1908</small>
- Sycon natalense <small>Borojevic, 1967</small>
- Sycon okadai <small>Hozawa, 1929</small>
- Sycon ornatum <small>Kirk, 1898</small>
- Sycon oscari <small>Van Soest & De Voogd, 2018</small>
- Sycon parvulum <small>(Preiwisch, 1904)</small>
- Sycon pedicellatum <small>Kirk, 1911</small>
- Sycon pentactinalis <small>Rossi, Farina, Borojevic & Klautau, 2006</small>
- Sycon plumosum <small>Tanita, 1943</small>
- Sycon proboscideum <small>Breitfuss, 1898</small>
- Sycon proboscideum <small>(Haeckel, 1870)</small>
- Sycon protectum <small>Lambe, 1896</small>
- Sycon pulchrum <small>Tanita, 1943</small>
- Sycon quadrangulatum <small>(Schmidt, 1868)</small>
- Sycon ramsayi <small>(Lendenfeld, 1885)</small>
- Sycon raphanus <small>Schmidt, 1862</small>
- Sycon rotundum <small>Tanita, 194</small>1
- Sycon satsumense <small>Hozawa, 1929</small>
- Sycon scaldiense <small>(Van Koolwijk, 1982)</small>
- Sycon schmidti <small>(Haeckel, 1872)</small>
- Sycon schuffneri <small>Dendy & Row, 1913</small>
- Sycon setosum <small>Schmidt, 1862</small>
- Sycon simushirense <small>Hozawa, 1918</small>
- Sycon stauriferum <small>(Preiwisch, 1904)</small>
- Sycon subhispidum <small>(Carter, 1886)</small>
- Sycon sycandra <small>(Lendenfeld, 1895)</small>
- Sycon tuba <small>Lendenfeld, 1891</small>
- Sycon urugamii <small>Tanita, 1940</small>
- Sycon verum <small>Row & Hozawa, 1931</small>
- Sycon vigilans <small>SarÃÂ & Gaino, 1971</small>
- Sycon villosum <small>(Haeckel, 1870)</small>
- Sycon yatsui <small>Hozawa, 1929</small>
References