| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Hydroides alatalateralis (Jones, 1962) |
Western Central Atlantic and Eastern Pacific | ||
| Hydroides albiceps (Grube, 1870) |
Indo-Pacific and the Mediterranean Sea | ||
| Hydroides bifurcatus Pixell, 1913 |
Western Central Pacific | ||
| Hydroides bispinosa Bush, 1910 |
Western Central Atlantic | ||
| Hydroides brachyacanthus Rioja, 1941 |
Pacific Ocean and the Mediterranean Sea | ||
| Hydroides bulbosus ten Hove, 1990 |
Western Indian Ocean | ||
| Hydroides centrospina Wu & Chen, 1981 |
Northwest Pacific | ||
| Hydroides chilensis Hartmann-Schröder, 1962 |
Eastern Pacific | ||
| Hydroides crucigera (Mörch, 1863) |
Western Central Atlantic | ||
| Hydroides deleoni Bastida-Zavala & ten Hove, 2003 |
Eastern Pacific | ||
| Hydroides dianthus (Verrill, 1873) |
Hard tube worm | Western Central Atlantic, Eastern Pacific and the Mediterranean | |
| Hydroides dipoma (Schmarda, 1861) |
Southeast Atlantic and Western Indian Ocean | ||
| Hydroides diramphus Mörch, 1863 |
Circumglobal | ||
| Hydroides elegans (Haswell, 1883) |
Calcareous tube worm | Circumglobal | |
| Hydroides exaltata (Marenzeller, 1884) |
Indo-Pacific | ||
| Hydroides exaltatus (von Marenzeller, 1884) |
Indo-West Pacific | ||
| Hydroides ezoensis Okuda |
Hydroid worm | Northwest Pacific | |
| Hydroides furcifer (Grube, 1878) |
Western Central Pacific | ||
| Hydroides fusca Imajima, 1976 |
Western Pacific | ||
| Hydroides gairacensis Augener, 1934 |
Western Central Atlantic and Eastern Pacific | ||
| Hydroides gracilis Bush, 1904 |
Eastern Pacific | ||
| Hydroides helmatus (Iroso, 1921) |
Mediterranean Sea | ||
| Hydroides heterocerus (Grube, 1868) |
Indo-West Pacific, Northeast Atlantic and the Mediterranean | ||
| Hydroides homoceros Pixell, 1913 |
Northeast Atlantic, Western Indian Ocean and the Mediterranean Sea | ||
| Hydroides inermis Monro, 1933 |
Eastern Pacific | ||
| Hydroides inornata Pillai, 1960 |
Northwest Pacific | ||
| Hydroides jusicola March, 1863 |
Northwest Pacific | ||
| Hydroides longispinosus Imajima, 1976 |
Western Pacific | ||
| Hydroides longistylaris Chen & Wu, 1980 |
Northwest Pacific | ||
| Hydroides lunulifera (Claparède 1868) |
Eastern Pacific | ||
| Hydroides malleolaspinus Straughan, 1967 |
Western Central Pacific | ||
| Hydroides malleophorus Rioja, 1942 |
Eastern Pacific | ||
| Hydroides microtis Mörch, 1863 |
Western Central Atlantic | ||
| Hydroides minax (Grube, 1878) |
Indo-West Pacific, Northeast Atlantic and the Mediterranean | ||
| Hydroides mongeslopezi Rioja, 1958 |
Western Central Atlantic | ||
| Hydroides mucronatus Rioja, 1958 |
Western Central Atlantic | ||
| Hydroides nanhaiensis Wu & Chen, 1981 |
Northwest Pacific | ||
| Hydroides niger Zibrowius, 1971 |
Mediterranean Sea | ||
| Hydroides norvegicus Gunnerus, 1768 |
Indo-Pacific, Northeast Atlantic and the Mediterranean | ||
| Hydroides novaepommeraniae Augener, 1925 |
Western Central Pacific and the Mediterranean | ||
| Hydroides ochoterenai Rioja, 1941 |
Eastern Pacific | ||
| Hydroides operculata (Treadwell, 1929) |
Indo-West Pacific, Northeast Atlantic and the Mediterranean | ||
| Hydroides panamensis Bastida-Zavala & ten Hove, 2003 |
Eastern Pacific | ||
| Hydroides parvus (Treadwell, 1901) |
Western Central Atlantic and Eastern Pacific | ||
| Hydroides perezi Fauvel, 1918 |
Western Indian Ocean | ||
| Hydroides protulicola Benedict, 1887 |
Western Central Atlantic | ||
| Hydroides pseudouncinatus Zibrowius, 1968 |
Mediterranean Sea | ||
| Hydroides ralumianus Augener, 1927 |
Western Central Pacific | ||
| Hydroides rhombobulus Chen & Wu,1980 |
Northwest Pacific | ||
| Hydroides salazarvallejoi Bastida-Zavala, 2002 |
Eastern Pacific | ||
| Hydroides sanctaecrucis (Kröyer, 1863) |
Western Central Atlantic and Eastern Pacific | ||
| Hydroides spongicola Benedict, 1887 |
Western Central Atlantic | ||
| Hydroides steinitzi Ben-Eliahu, 1972 |
Western Indian Ocean, Northeast Atlantic and the Mediterranean | ||
| Hydroides stoichadon Zibrowius, 1971 |
Mediterranean Sea | ||
| Hydroides tenhovei Bastida-Zavala & de León-González, 2002 |
Eastern Pacific | ||
| Hydroides trilobulus Chen & Wu, 1978 |
Northwest Pacific | ||
| Hydroides trompi Bastida-Zavala & ten Hove, 2003 |
Eastern Pacific | ||
| Hydroides tuberculatus Imajima, 1976 |
Western Pacific | ||
| Hydroides uncinata (Philippi, 1844) |
Western Central Atlantic and Eastern Pacific |