CCDB is a community resource. If you are aware of any missing data or if any of the counts are erroneous, please submit new counts, or report erroneous counts.
CCDB → Angiosperms → Hydrocharitaceae → Thalassia
| Taxon name | Status | Median (n) |
| Thalassia testudinum Banks & Sol. ex K. D. Koenig | Accepted | 9 |