Where Butterfly blenny has been recorded
GBIF occurrence records for Blennius ocellaris, mapped and tabulated by country.
8,408 georeferenced occurrence records with coordinates are published for Blennius ocellaris through GBIF, from 28 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
- 8,408
- Countries / areas
- 28
- Mapped locations
- 178
- Records sampled for the map
- 3,000
- Inland records omitted
- 21
- Gbif taxonkey
- 2395359
Countries and areas with the most records (GBIF)
Spain — 4,817 records; United Kingdom of Great Britain and Northern Ireland — 1,379 records; France — 951 records; Portugal — 540 records; Ireland — 277 records; Croatia — 216 records; Guernsey — 68 records; Italy — 39 records; Isle of Man — 29 records; Malta — 14 records; Israel — 12 records; Jersey — 11 records; Tunisia — 8 records; Türkiye — 8 records; Greece — 7 records.
Source: GBIF Occurrence Search (taxonKey 2395359) — https://www.gbif.org/occurrence/search?taxon_key=2395359&has_coordinate=true (records CC0 / CC BY). Accessed 2026-09-23.
Marine regions with a WoRMS distribution record
European waters (ERMS scope); Greek Exclusive Economic Zone; Black Sea; Irish Exclusive economic Zone; Azores Exclusive Economic Zone; Israeli part of the Mediterranean Sea - Eastern Basin; Ukrainian part of the Black Sea.
Source: WoRMS distribution records (MarineRegions) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=126761 (CC BY 4.0). Accessed 2026-09-23.
How to read this map
The map plots a sample of 3,000 of the 8,408 records, deduplicated to a half-degree grid, so dense areas do not merge into one blob. The sample covers 16 of the 28 countries or areas with records; the areas absent from the sample hold 241 records in total (Croatia, Tunisia, Morocco, Netherlands, Egypt, Monaco, Mauritania, Libya).
21 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 2395359) — https://www.gbif.org/occurrence/search?taxon_key=2395359&has_coordinate=true (records CC0 / CC BY); WoRMS distribution records (MarineRegions) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=126761 (CC BY 4.0); Natural Earth 110m basemap — https://www.naturalearthdata.com/ (public domain). Accessed 2026-09-23.
Frequently Asked Questions
How many countries has the Butterfly blenny been recorded in?
GBIF data documents Blennius ocellaris occurrences across 28 countries or marine areas. The distribution page visualises 178 distinct mapped locations drawn from a sample of 3,000 records.
How many georeferenced records exist for the Butterfly blenny?
There are 8,408 georeferenced occurrence records with coordinates published through GBIF under taxon key 2395359. Twenty-one inland records are excluded from the map to keep the focus on marine habitats.
Why do some coastlines show far more Butterfly blenny records than others?
Record density largely mirrors survey effort rather than true abundance, so heavily studied shorelines appear over-represented. The map therefore reflects where people have looked as much as where the blenny actually lives.
What is the underlying data source for the Butterfly blenny distribution map?
All georeferenced points are aggregated from the Global Biodiversity Information Facility (GBIF) database. The page samples 3,000 of the 8,408 available records to render the visual map while still tabulating the full country-by-country breakdown.
Where can I see the complete list of Butterfly blenny occurrence locations?
The distribution page pairs a visual map of 178 locations with a tabulated, country-by-country listing of the full 8,408 GBIF records. Together they cover the species' entire documented spread across all 28 recorded countries or marine areas.
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