Pylaiella littoralis
- kingdom: Chromista
- phylum: Ochrophyta
- class: Phaeophyceae
- order: Ectocarpales
- family: Acinetosporaceae
- genus: Pylaiella
- species: Pylaiella littoralis
- Nanaimo
- North Saanich
- Sooke
British Columbia- Halifax
Nova Scotia- Gaspé
Quebec
Canada- Roscoff
A2
France- Vlissingen
Zeeland
Netherlands- Kaikoura
Canterbury
New Zealand- Porto
- Vila Nova de Gaia
Porto
Portugal- Berwick-Upon-Tweed
- Birchington-on-Sea
- Borough Green
- Brighton
- Chafford Hundred
- Clacton-on-Sea
- Dover
- Dovercourt
- Falmouth
- Folkestone
- Gillingham
- Gravesend
- Grays
- Greenhithe
- Harwich
- Hoo
- Hugh Town
- Isles of Scilly
- Margate
- Penzance
- Saint Osyth
- Swanage
- Swanscombe
- Tilbury
- West Thurrock
- Westgate on Sea
- Weymouth
- Whitby
England
United Kingdom- Diamond Ridge
- Dutch Harbor
- Homer
- Nome
- Unalaska
Alaska- Bridgeport
- West Haven
Connecticut- Honolulu
Hawaii- Kittery
- Kittery Point
- Northport
Maine- Cohasset
- Lynn
- Medford
- Nahant
- North Scituate
- Sandwich
- Somerville
Massachusetts- New Castle
New Hampshire
United States