Ulva rigida
- kingdom: Plantae
- phylum: Chlorophyta
- class: Ulvophyceae
- order: Ulvales
- family: Ulvaceae
- genus: Ulva
- species: Ulva rigida
Encounter Bay
South Australia
Australia
Welchman Hall
Saint Thomas
Barbados
Torres
Rio Grande do Sul
Brazil
Cidade Velha
Ribeira Grande de Santiago
Santa Maria
Sal
Cape Verde
Xiangyang
Shandong
China
Alamar
Guanabacoa
Havana
Cuba
Roche-à-Bateau
Sud
Haiti
Port Royal
Kingston
Jamaica
Chimbote
Ancash
Peru
La Parguera
Lajas
Puerto Rico
Tossa de Mar
Catalonia
Mugia
Galicia
Spain
Mahonda
South
Zanzibar Central
Tanzania
Menai Bridge
Wales
United Kingdom
Nome
Alaska
Bridgeport
Connecticut
Key West
Florida
Friday Harbor
Sequim
Washington
United States
Victoria