• Ergasilus von Nordmann, 1832
• Ergasilus acusicestraeus El-Rashidy & Boxshall, 1999
• Ergasilus amblycephalus Kuang, in Kuang & Qian, 1983
• Ergasilus amplectens Dogiel & Akhmerov, 1952 accepted as Dermoergasilus amplectens (Dogiel & Akhmerov, 1952)
• Ergasilus anchoratus Markevich, 1946
• Ergasilus arenalbus van der Spuy, Narciso, Hadfield, Wepener & Smit, 2024
• Ergasilus argulus Cressey in Cressey & Collette, 1970
• Ergasilus arthrosis Roberts, 1969
• Ergasilus atafonensis Amado & Rocha, 1996
• Ergasilus auritus Markevich, 1940
• Ergasilus australiensis Roubal, 1981
• Ergasilus bagarii Kuang, in Kuang & Qian, 1983
• Ergasilus bahiensis Amado & Rocha, 1996
• Ergasilus baicalensis Messjatzeff, 1928 accepted as Ergasilus sieboldi von Nordmann, 1832
• Ergasilus bani Ohtsuka, Ho & Nagasawa, 2004
• Ergasilus barai Yousuf, Batool & Begum, 2017 accepted as Ergasilus brari Battish & Brar, 1990
• Ergasilus barbi Rahemo, 1982
• Ergasilus batai Karamchandani, 1952
• Ergasilus bengalensis Southwell & Prashad, 1918
• Ergasilus biuncinatus Gadd, 1901 accepted as Thersitina gasterostei (Pagenstecher, 1861)
• Ergasilus boettgeri Reichenbach-Klinke, 1958
• Ergasilus boleophthalmi Adday & Ali, 2011
• Ergasilus borneoensis Yamaguti, 1954
• Ergasilus brari Battish & Brar, 1990
• Ergasilus brevimanus (Sars G.O., 1909)
• Ergasilus briani Markevich, 1933
• Ergasilus bryconis Thatcher, 1981
• Ergasilus caeruleus Wilson C.B., 1911
• Ergasilus callophysus Thatcher & Boeger, 1984
• Ergasilus caparti Míč, Řehulková & Seifertová, 2023
• Ergasilus caraguatatubensis Amado & Rocha, 1996
• Ergasilus celestis Mueller J.F., 1937
• Ergasilus centrarchidarum Wright R., 1882
• Ergasilus cerastes Roberts, 1969
• Ergasilus ceylonensis Fernando & Hanek, 1973
• Ergasilus chautauquaensis Fellows, 1887
• Ergasilus chelangulatus Thatcher & Brasil-Sato, 2008
• Ergasilus chintensis van der Spuy, Narciso, Hadfield, Wepener & Smit, 2024
• Ergasilus clupeidarum Johnson S.K. & Rogers, 1972
• Ergasilus coatiarus Araujo & Varella, 1998
• Ergasilus cochlearius Kuang & Liu, 1991
• Ergasilus coleus Cressey in Cressey & Collette, 1970 accepted as Dermoergasilus coleus (Cressey in Cressey & Collette, 1970)
• Ergasilus colomesus Thatcher & Boeger, 1983
• Ergasilus confusus Bere, 1931 accepted as Ergasilus luciopercarum Henderson, 1926
• Ergasilus coniformis Kim I.H. & Choi, 2003
• Ergasilus cotti Kellicott, 1892
• Ergasilus cunningtoni Capart, 1944
• Ergasilus curticrus Muriel-Hoyos, Santana-Pineros, Cruz-Quintana & Suarez-Morales, 2015
• Ergasilus cyanopictus Carvalho, 1962
• Ergasilus cyprinaceus Rogers, 1969
• Ergasilus danjiangensis Song, Yao & Nie, 2008
• Ergasilus davidi Suárez-Morales & Santana-Pineros, 2008
• Ergasilus depressus Sars G.O., 1863 accepted as Ergasilus sieboldi von Nordmann, 1832
• Ergasilus divergens (Kokubo, 1914)
• Ergasilus ecuadorensis El-Rashidy & Boxshall, 2002
• Ergasilus efficatus (Leigh-Sharpe, 1934) accepted as Bomolochus efficatus Leigh-Sharpe, 1934
• Ergasilus egyptiacus Abdel-Hady, Bayoumy & Osman, 2008
• Ergasilus elegans Wilson C.B., 1916 accepted as Ergasilus versicolor Wilson C.B., 1911
• Ergasilus elongatus Thomsen, 1949 accepted as Ergasilus felichthys (Pearse, 1947)
• Ergasilus elongatus Wilson C.B., 1916
• Ergasilus enshiensis Liu & Wang, 1997
• Ergasilus esocis Sumpf, 1871 accepted as Ergasilus sieboldi von Nordmann, 1832
• Ergasilus euripedesi Montú, 1980 accepted as Gauchergasilus euripedesi (Montú, 1980)
• Ergasilus extensus El-Rashidy & Boxshall, 2002
• Ergasilus felichthys (Pearse, 1947)
• Ergasilus fidiformis Yamaguti, 1953
• Ergasilus flaccidus Fryer, 1965
• Ergasilus foresti Boxshall, Araujo & Montu, 2002
• Ergasilus fragilis Mueller J.F., 1937 accepted as Ergasilus megaceros Wilson C.B., 1916
• Ergasilus fryeri Paperna, 1964
• Ergasilus funduli Krøyer, 1863
• Ergasilus gasterostei (Pagenstecher, 1861) accepted as Thersitina gasterostei (Pagenstecher, 1861)
• Ergasilus genuinus (Kokubo, 1914)
• Ergasilus gibbus von Nordmann, 1832
• Ergasilus glyptothoracis Kuang, in Kuang & Qian, 1983
• Ergasilus gobiorum Markevich & Sukhnenko, 1967
• Ergasilus hamiltoni Southwell & Prashad, 1918
• Ergasilus hemibagri Zhang & Ma, 1994
• Ergasilus hoferi Borodin, 1915 accepted as Ergasilus sieboldi von Nordmann, 1832
• Ergasilus holobryconis Malta & Varella, 1986
• Ergasilus hydrolycus Thatcher, Boeger & Robertson B.A., 1984
• Ergasilus hypomesi Yamaguti, 1936
• Ergasilus hypophthalmi Boeger, Martins & Thatcher, 1993
• Ergasilus iheringi Tidd, 1942 accepted as Tiddergasilus iheringi (Tidd, 1942)
• Ergasilus ilani Oldewage & van As, 1988
• Ergasilus inflatipes Cressey in Cressey & Collette, 1970
• Ergasilus intermedius Kabata, 1992 accepted as Dermoergasilus intermedius (Kabata, 1992)
• Ergasilus irakiensis Al-Daraji, 2002 accepted as Ergasilus iraquensis Amado in Amado, da Rocha, Piasecki, Al-Daraji & Mhaisen, 2001
• Ergasilus iraquensis Amado in Amado, da Rocha, Piasecki, Al-Daraji & Mhaisen, 2001
• Ergasilus japonicus Harada, 1930 accepted as Neoergasilus japonicus (Harada, 1930)
• Ergasilus jaraquensis Thatcher & Robertson B.A., 1982
• Ergasilus jiangxiensis Liu, 1998
• Ergasilus kabatai Thomas, 1994
• Ergasilus kandti Douwe, 1912
• Ergasilus kimi Boxshall, 2016
• Ergasilus labracis Krøyer, 1863
• Ergasilus lacusauratus Marques, Boeger & Brasil-Sato, 2015
• Ergasilus lagunaris Grandori, 1925
• Ergasilus lamellifer Fryer, 1961
• Ergasilus lanceolatus Wilson C.B., 1916