sea-fern grass
- kingdom: Plantae
- phylum: Tracheophyta
- class: Liliopsida
- order: Poales
- family: Poaceae
- genus: Catapodium
- species: Catapodium marinum
- Belgium
- France
- Xylaganí
East Macedonia and Thrace- Platariá
- Thesprotikón
Epirus- Lefkáda
Ionian Islands- Páros
South Aegean- Néa Ankhíalos
Thessaly- Náfpaktos
West Greece
Greece- Scheveningen
South Holland
Netherlands- Sagres
Faro
Portugal- Blyth
- Hartlepool
England- Halkyn
Wales
United Kingdom