1. Species Hippocampus abdominalis Lesson, 1827
2. Species Hippocampus alatus Kuiter, 2001
3. Species Hippocampus algiricus Kaup, 1856
4. Species Hippocampus angustus Günther, 1870
5. Species Hippocampus barbouri Jordan & Richardson, 1908
6. Species Hippocampus bargibanti Whitley, 1970
7. Species Hippocampus borboniensis Duméril, 1870
8. Species Hippocampus breviceps Peters, 1869
9. Species Hippocampus camelopardalis Bianconi, 1854
10. Species Hippocampus capensis Boulenger, 1900
11. Species Hippocampus casscsio Zhang, Qin, Wang & Lin, 2016
12. Species Hippocampus colemani Kuiter, 2003
13. Species Hippocampus comes Cantor, 1849
14. Species Hippocampus coronatus Temminck & Schlegel, 1850
15. Species Hippocampus curvicuspis Fricke, 2004
16. Species Hippocampus debelius Gomon & Kuiter, 2009
17. Species Hippocampus denise Lourie & Randall, 2003
18. Species Hippocampus erectus Perry, 1810
19. Species Hippocampus fisheri Jordan & Evermann, 1903
20. Species Hippocampus fuscus Rüppell, 1838
21. Species Hippocampus grandiceps Kuiter, 2001
22. Species Hippocampus guttulatus Cuvier, 1829
23. Species Hippocampus haema Han, Kim, Kai & Senou, 2017
24. Species Hippocampus hendriki Kuiter, 2001
25. Species Hippocampus hippocampus (Linnaeus, 1758)
26. Species Hippocampus histrix Kaup, 1856
27. Species Hippocampus ingens Girard, 1858
28. Species Hippocampus japapigu Short, Smith, Motomura, Harasti & Hamilton, 2018
29. Species Hippocampus jayakari Boulenger, 1900
30. Species Hippocampus jugumus Kuiter, 2001
31. Species Hippocampus kelloggi Jordan & Snyder, 1901
32. Species Hippocampus kuda Bleeker, 1852
33. Species Hippocampus lichtensteinii Kaup, 1856
34. Species Hippocampus minotaur Gomon, 1997
35. Species Hippocampus mohnikei Bleeker, 1853
36. Species Hippocampus montebelloensis Kuiter, 2001
37. Species Hippocampus multispinus Kuiter, 2001
38. Species Hippocampus nalu Short, Claassens, Smith, De Brauwer, Hamilton, Stat & Harasti, 2020
39. Species Hippocampus paradoxus Foster & Gomon, 2010
40. Species Hippocampus patagonicus Piacentino & Luzzatto, 2004
41. Species Hippocampus planifrons Peters, 1877
42. Species Hippocampus pontohi Lourie & Kuiter, 2008
43. Species Hippocampus pusillus Fricke, 2004
44. Species Hippocampus queenslandicus Horne, 2001
45. Species Hippocampus reidi Ginsburg, 1933
46. Species Hippocampus satomiae Lourie & Kuiter, 2008
47. Species Hippocampus semispinosus Kuiter, 2001
48. Species Hippocampus sindonis Jordan & Snyder, 1901
49. Species Hippocampus spinosissimus Weber, 1913
50. Species Hippocampus subelongatus Castelnau, 1873
51. Species Hippocampus suezensis Duncker, 1940
52. Species Hippocampus trimaculatus Leach, 1814
53. Species Hippocampus tyro Randall & Lourie, 2009
54. Species Hippocampus waleananus Gomon & Kuiter, 2009
55. Species Hippocampus whitei Bleeker, 1855
56. Species Hippocampus zebra Whitley, 1964
57. Species Hippocampus zosterae Jordan & Gilbert, 1882
58. Species Hippocampus agnesae Fowler, 1907 accepted as Hippocampus abdominalis Lesson, 1827
59. Species Hippocampus aimei Roule, 1916 accepted as Hippocampus spinosissimus Weber, 1913 (pro parte synonym: this name has been used for two different species)
60. Species Hippocampus aimei Roule, 1916 accepted as Hippocampus barbouri Jordan & Richardson, 1908 (pro parte synonym: this name has been used for two different species)
61. Species Hippocampus antiquorum Leach, 1814 accepted as Hippocampus hippocampus (Linnaeus, 1758)
62. Species Hippocampus antiquus Risso, 1827 accepted as Hippocampus hippocampus (Linnaeus, 1758)
63. Species Hippocampus arnei Roule, 1916 accepted as Hippocampus spinosissimus Weber, 1913 (misspelling, pro parte synonym: this name has been used for two different species)
64. Species Hippocampus arnei Roule, 1916 accepted as Hippocampus barbouri Jordan & Richardson, 1908 (misspelling, pro parte synonym: this name has been used for two different species)
65. Species Hippocampus aterrimus Jordan & Snyder, 1902 accepted as Hippocampus kuda Bleeker, 1852
66. Species Hippocampus bicuspis Kaup, 1856 accepted as Hippocampus guttulatus Cuvier, 1829 (ambiguous synonym)
67. Species Hippocampus biocellatus Kuiter, 2001 accepted as Hippocampus planifrons Peters, 1877
68. Species Hippocampus bleekeri Fowler, 1907 accepted as Hippocampus abdominalis Lesson, 1827
69. Species Hippocampus brachyrhynchus Duncker, 1914 accepted as Hippocampus fuscus Rüppell, 1838
70. Species Hippocampus brevirostris Schinz, 1822 accepted as Hippocampus hippocampus (Linnaeus, 1758)
71. Species Hippocampus brunneus Bean, 1906 accepted as Hippocampus erectus Perry, 1810
72. Species Hippocampus cameleopardalis Bianconi, 1854 accepted as Hippocampus camelopardalis Bianconi, 1854 (misspelling)
73. Species Hippocampus cameleopardalus Bianconi, 1854 accepted as Hippocampus camelopardalis Bianconi, 1854 (misspelling)
74. Species Hippocampus chinensis Basilewsky, 1855 accepted as Hippocampus kuda Bleeker, 1852
75. Species Hippocampus dahli Ogilby, 1908 accepted as Hippocampus trimaculatus Leach, 1814
76. Species Hippocampus deanei Duméril, 1861 accepted as Hippocampus algiricus Kaup, 1856
77. Species Hippocampus ecuadorensis Fowler, 1922 accepted as Hippocampus ingens Girard, 1858
78. Species Hippocampus elongatus Castelnau, 1873 accepted as Hippocampus subelongatus Castelnau, 1873
79. Species Hippocampus erinaceus Günther, 1870 accepted as Hippocampus angustus Günther, 1870
80. Species Hippocampus europaeus Ginsburg, 1933 accepted as Hippocampus hippocampus (Linnaeus, 1758) (junior synonym)
81. Species Hippocampus fascicularis Kaup, 1856 accepted as Hippocampus erectus Perry, 1810
82. Species Hippocampus filamentosus Duméril, 1870 accepted as Hippocampus guttulatus Cuvier, 1829 (ambiguous synonym)
83. Species Hippocampus graciliformis McCulloch, 1911 accepted as Hippocampus abdominalis Lesson, 1827
84. Species Hippocampus gracilis Gill, 1862 accepted as Hippocampus ingens Girard, 1858
85. Species Hippocampus gracilissimus Temminck & Schlegel, 1850 accepted as Acentronura gracilissima (Temminck & Schlegel, 1850)
86. Species Hippocampus heptagonus Rafinesque, 1810 accepted as Hippocampus hippocampus (Linnaeus, 1758) (synonym)
87. Species Hippocampus hildebrandi Ginsburg, 1933 accepted as Hippocampus ingens Girard, 1858
88. Species Hippocampus hilonis Jordan & Evermann, 1903 accepted as Hippocampus kuda Bleeker, 1852
89. Species Hippocampus horai Duncker, 1926 accepted as Hippocampus kuda Bleeker, 1852
90. Species Hippocampus hudsonius DeKay, 1842 accepted as Hippocampus erectus Perry, 1810
91. Species Hippocampus hystrix Kaup, 1856 accepted as Hippocampus histrix Kaup, 1856 (misspelling)
92. Species Hippocampus japonicus Kaup, 1856 accepted as Hippocampus mohnikei Bleeker, 1853
93. Species Hippocampus kampylotrachelos Bleeker, 1854 accepted as Hippocampus trimaculatus Leach, 1814
94. Species Hippocampus kaupii Duméril, 1870 accepted as Hippocampus algiricus Kaup, 1856
95. Species Hippocampus kincaidi Townsend & Barbour, 1906 accepted as Hippocampus erectus Perry, 1810
96. Species Hippocampus laevicaudatus Kaup, 1856 accepted as Hippocampus erectus Perry, 1810
97. Species Hippocampus lenis De Vis, 1908 accepted as Hippocampus trimaculatus Leach, 1814
98. Species Hippocampus longirostris Schinz, 1822 accepted as Hippocampus guttulatus Cuvier, 1829 (synonym)
99. Species Hippocampus manadensis Bleeker, 1856 accepted as Hippocampus trimaculatus Leach, 1814
100. Species Hippocampus mannulus Cantor, 1849 accepted as Hippocampus trimaculatus Leach, 1814
101. Species Hippocampus marginalis Kaup, 1856 accepted as Hippocampus erectus Perry, 1810
102. Species Hippocampus melanospilos Bleeker, 1854 accepted as Hippocampus kuda Bleeker, 1852
103. Species Hippocampus moluccensis Bleeker, 1852 accepted as Hippocampus kuda Bleeker, 1852
104. Species Hippocampus monckei Bleeker, 1853 accepted as Hippocampus mohnikei Bleeker, 1853 (misspelling)
105. Species Hippocampus monickei Bleeker, 1853 accepted as Hippocampus mohnikei Bleeker, 1853 (misspelling)
106. Species Hippocampus monikei Bleeker, 1853 accepted as Hippocampus mohnikei Bleeker, 1853 (misspelling)
107. Species Hippocampus natalensis von Bonde, 1923 accepted as Hippocampus fuscus Rüppell, 1838
108. Species Hippocampus novaehebudorum Fowler, 1944 accepted as Hippocampus kuda Bleeker, 1852
109. Species Hippocampus novaehollandae Steindachner, 1866 accepted as Hippocampus whitei Bleeker, 1855 (misspelling)
110. Species Hippocampus novaehollandiae Steindachner, 1866 accepted as Hippocampus whitei Bleeker, 1855
111. Species Hippocampus obscurus Hemprich & Ehrenberg, 1856 accepted as Hippocampus fuscus Rüppell, 1838
112. Species Hippocampus obscurus Ehrenberg, 1871 accepted as Hippocampus fuscus Rüppell, 1838
113. Species Hippocampus obtusus Ginsburg, 1933 accepted as Hippocampus reidi Ginsburg, 1933
114. Species Hippocampus pentagonus Rafinesque, 1810 accepted as Hippocampus hippocampus (Linnaeus, 1758) (misspelling)
115. Species Hippocampus poeyi Howell Rivero, 1934 accepted as Hippocampus reidi Ginsburg, 1933
116. Species Hippocampus polytaenia Bleeker, 1854 accepted as Hippocampus kuda Bleeker, 1852
117. Species Hippocampus procerus Kuiter, 2001 accepted as Hippocampus whitei Bleeker, 1855
118. Species Hippocampus punctulatus Guichenot, 1853 accepted as Hippocampus erectus Perry, 1810
119. Species Hippocampus punctulatus Kaup, 1856 accepted as Hippocampus algiricus Kaup, 1856
120. Species Hippocampus raji Whitley, 1955 accepted as Hippocampus kuda Bleeker, 1852
121. Species Hippocampus ramulosus Leach, 1814 accepted as Hippocampus guttulatus Cuvier, 1829 (Synonym)
122. Species Hippocampus regulus Ginsburg, 1933 accepted as Hippocampus zosterae Jordan & Gilbert, 1882
123. Species Hippocampus rhynchomacer Duméril, 1870 accepted as Hippocampus kuda Bleeker, 1852
124. Species Hippocampus rosamondae Borodin, 1928 accepted as Hippocampus zosterae Jordan & Gilbert, 1882
125. Species Hippocampus severnsi Lourie & Kuiter, 2008 accepted as Hippocampus pontohi Lourie & Kuiter, 2008 (synonym)
126. Species Hippocampus stylifer Jordan & Gilbert, 1882 accepted as Hippocampus erectus Perry, 1810
127. Species Hippocampus subcoronatus Günther, 1866 accepted as Hippocampus camelopardalis Bianconi, 1854
128. Species Hippocampus taeniops Fowler, 1904 accepted as Hippocampus kuda Bleeker, 1852
129. Species Hippocampus taeniopterus Bleeker, 1852 accepted as Hippocampus kuda Bleeker, 1852
130. Species Hippocampus takakurae Tanaka, 1916 accepted as Hippocampus trimaculatus Leach, 1814
131. Species Hippocampus tetragonous (Mitchill, 1814) accepted as Hippocampus erectus Perry, 1810
132. Species Hippocampus tristis Castelnau, 1872 accepted as Hippocampus kuda Bleeker, 1852
133. Species Hippocampus tuberculatus Castelnau, 1875 accepted as Hippocampus breviceps Peters, 1869
134. Species Hippocampus villosus Günther, 1880 accepted as Hippocampus erectus Perry, 1810
135. Species Hippocampus vulgaris Cloquet, 1821 accepted as Hippocampus hippocampus (Linnaeus, 1758)

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