==Species==The World Register of Marine Species lists the following species:* "Balanoglossus apertus" (Spengel, 1893)* "Balanoglossus aurantiacus" (Girard, 1853)* "Balanoglossus australiensis" (Hill, 1894)* "Balanoglossus biminiensis" (Willey, 1899)* "Balanoglossus capensis" (Gilchrist, 1908)* "Balanoglossus carnosus" (Willey, 1899)* "Balanoglossus clavigerus" (Delle Chiaje, 1829)* "Balanoglossus gigas" (Fr.
Виды баланоглоссов согласно мировому регистру морских видов:* "Balanoglossus apertus" (Spengel, 1893)* "Balanoglossus aurantiacus" (Girard, 1853)* "Balanoglossus australiensis" (Hill, 1894)* "Balanoglossus biminiensis" (Willey, 1899)* "Balanoglossus capensis" (Gilchrist, 1908)* "Balanoglossus carnosus" (Willey, 1899)* "Balanoglossus clavigerus" (Delle Chiaje, 1829)* "Balanoglossus gigas" (Fr.