Where Intertidal seagrass has been recorded
GBIF occurrence records for Zostera japonica, mapped and tabulated by country.
13,585 georeferenced occurrence records with coordinates are published for Zostera japonica through GBIF, from 9 countries or marine areas. This page maps those records and lists where they come from. Occurrence records reflect where people have looked as well as where the species lives, so well-surveyed coastlines are over-represented.
- Georeferenced records
- 13,585
- Countries / areas
- 9
- Mapped locations
- 23
- Records sampled for the map
- 3,000
- Inland records omitted
- 25
- Gbif taxonkey
- 2863943
Countries and areas with the most records (GBIF)
Japan — 13,038 records; Canada — 252 records; United States of America — 205 records; Chinese Taipei — 36 records; Russian Federation — 26 records; Viet Nam — 17 records; Korea, Republic of — 5 records; Hong Kong — 4 records; China — 2 records.
Source: GBIF Occurrence Search (taxonKey 2863943) — https://www.gbif.org/occurrence/search?taxon_key=2863943&has_coordinate=true (records CC0 / CC BY). Accessed 2026-09-23.
Marine regions with a WoRMS distribution record
California; United States part of the North Pacific Ocean; United States part of the The Coastal Waters of Southeast Alaska and British Columbia.
Source: WoRMS distribution records (MarineRegions) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=495080 (CC BY 4.0). Accessed 2026-09-23.
How to read this map
The map plots a sample of 3,000 of the 13,585 records, deduplicated to a half-degree grid, so dense areas do not merge into one blob. The sample covers 7 of the 9 countries or areas with records; the areas absent from the sample hold 22 records in total (Viet Nam, Korea, Republic of).
25 records plotting inland were omitted: for a marine species those are almost always the holding institution's coordinates rather than a collection site.
Records show where the species has been observed and reported, not a modelled range.
Source: GBIF Occurrence Search (taxonKey 2863943) — https://www.gbif.org/occurrence/search?taxon_key=2863943&has_coordinate=true (records CC0 / CC BY); WoRMS distribution records (MarineRegions) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=495080 (CC BY 4.0); Natural Earth 110m basemap — https://www.naturalearthdata.com/ (public domain). Accessed 2026-09-23.
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