Halodule

Halodule is a genus of plants in the family Cymodoceaceae described as a genus in 1841. It is widespread on tropical and semi-tropical ocean shores of all continents except Europe and Antarctica.

Species
Hybridization has been reported in the Pacific between H. pinifolia and H. uninervis.

There are six recognised species:
 * Halodule bermudensis - Bermuda
 * Halodule ciliata - Panama
 * Halodule emarginata - SE Brazil
 * Halodule pinifolia - India, Sri Lanka, Southeast Asia, Hainan, Taiwan, Ryukyu Islands, New Guinea, Queensland, Fiji, New Caledonia, Tonga, Caroline Islands
 * Halodule uninervis - shores of Indian + Pacific Oceans, Red Sea, Persian Gulf, Bay of Bengal, Papuasia, Queensland, Micronesia
 * Halodule wrightii - Atlantic Ocean shores including Caribbean + Gulf of Mexico: Africa (Senegal, Mauritania, Angola), West Indies, South America (Venezuela, Brazil), Mexico, Central America, United States (TX LA MS AL FL NC MD)