| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Hydrophis atriceps Günther, 1864 |
Black-headed seasnake | Indo-West Pacific | |
| Hydrophis belcheri Gray, 1849 |
Faint-banded seasnake | Indo-West Pacific | |
| Hydrophis bituberculatus Peters, 1872 |
Peter's sea snake | Indo-West Pacific | 112 |
| Hydrophis brooki Günther, 1872 |
Indo-West Pacific | ||
| Hydrophis caerulescens Shaw, 1802 |
Dwarf seasnake | Indo-West Pacific and the Mediterranean | 82 |
| Hydrophis coggeri Kharin, 1984 |
Cogger's sea snake | Northeast Atlantic, Mediterranean and Indo-West Pacific | 137 |
| Hydrophis curtus (Shaw, 1802) |
Hardwicke's spine-bellied seasnake | Indo-West Pacific | 128 |
| Hydrophis cyanocinctus Daudin, 1803 |
Annulated sea snake | Indo-West Pacific | 190 |
| Hydrophis czeblukovi Kharin, 1984 |
Fine-spined seasnake | Indo-West Pacific | |
| Hydrophis donaldi Ukuwela, Sanders & Fry, 2012 |
Western Central Pacific | ||
| Hydrophis elegans Gray, 1842 |
Elegant seasnake | Indo-West Pacific | 210 |
| Hydrophis fasciatus Schneider, 1799 |
Striped sea snake | Indo-West Pacific | |
| Hydrophis gracilis (Shaw, 1802) |
Slender seasnake | Indo-West Pacific | |
| Hydrophis inornatus Gray, 1849 |
Plain seasnake | Indo-West Pacific | |
| Hydrophis klossi Boulenger, 1912 |
Kloss' sea snake | Indo-West Pacific | |
| Hydrophis laboutei Rasmussen & Ineich, 2000 |
Laboute's sea snake | Northwest Pacific and the Mediterranean | |
| Hydrophis lamberti Smith, 1917 |
Lambert's sea snake | Western Central Pacific | 125 |
| Hydrophis lapemoides Gray, 1849 |
Persian Gulf sea snake | Indo-West Pacific | 129.6 |
| Hydrophis macdowelli Kharin, 1983 |
McDowell's sea snake | Western Central Pacific | 90 |
| Hydrophis mamillaris Daudin, 1803 |
Bombay sea snake | Indo-West Pacific | |
| Hydrophis melanocephalus Gray, 1849 |
Slender-necked seasnake | Indo-West Pacific | 150 |
| Hydrophis melanosoma Günther, 1864 |
Black-banded seasnake | Indo-West Pacific | |
| Hydrophis obscurus Daudin, 1803 |
Russel's sea snake | Indo-West Pacific | |
| Hydrophis ornatus Gray, 1842 |
Ornate reef seasnake | Northeast Atlantic, the Mediterranean and Indo-Pacific | 163 |
| Hydrophis pachyceros Fischer, 1855 |
Western Pacific | ||
| Hydrophis pacificus Boulenger, 1896 |
Pacific seasnake | Indo-West Pacific | 185 |
| Hydrophis parviceps Smith, 1935 |
Western Pacific | ||
| Hydrophis peronii (Duméril, 1853) |
Spiny-headed seasnake | Northeast Atlantic to Western Pacific | 130 |
| Hydrophis platura (Linnaeus, 1766) |
Pelagic sea snake | Indo-Pacific and the Mediterranean Sea | 113 |
| Hydrophis schistosus Daudin, 1803 |
Beaked sea snake | Indo-West Pacific | 140 |
| Hydrophis semperi Garman, 1881 |
Lake Taal snake | Western Pacific | |
| Hydrophis sibauensis Rasmussen, Auliya & Böhme, 2001 |
Kalimantan sea snake | Indo-West Pacific | |
| Hydrophis spiralis Shaw, 1802 |
Yellow sea snake | Northeast Atlantic, Mediterranean and Indo-West Pacific | 1745 |
| Hydrophis stokesii (Gray, 1846) |
Stokes' sea snake | Indo-Pacific | 160 |
| Hydrophis stricticollis Günther, 1864 |
Collared sea snake | Indo-West Pacific | |
| Hydrophis torquatus Günther, 1864 |
West coast black-headed sea snake | Indo-West Pacific | |
| Hydrophis viperinus (Schmidt, 1852) |
Viperine sea snake | Indo-West Pacific | 78 |
| Hydrophis vorisi Kharin, 1984 |
Estuarine seasnake | Indo-Pacific |