Halophila stipulacea is a species of seagrass in the Hydrocharitaceae family.

[3] It is native to the Indian Ocean that spread into the Mediterranean after the opening of the Suez Canal.

[8] In the United States Virgin Islands, H. stipulacea was first observed in 2012 along the northeast coast of St. John, followed by St. Thomas and St. Croix in 2013 and 2016 respectively.

[5][8] H. stipulacea was observed for the first time on the Venezuelan coast at Playa Mansa, near Naiguatá in Vargas state.

[7] It can do this by forming thick mats, adapt to changes in environmental conditions, and exist along an extreme depth gradient.