Factsheets for Green Seaweeds (phylum Chlorophyta)

Genus: Ulva Trade name: ulva Symbol: UL

AuthorityLinnaeus Type species: n/a
Commercial species:  lactuca (LAC), pertusa (PET), reticulata (RET) & spp.
Common names: Ana-awosa, Aosa, Awosa, Chicory sea lettuce, amgamet, Glasán, Green Laver, Hai Tsai, Haisai Kun-po, Ihixlhewis, Klop-tsai-yup, Kwanpo, Lacy Sea Lettuce, Laitue de mer, Lechuga de samba, Lettuce laver, Limu Pahapaha, Limu Palahalaha, Luche, Meersalat, Pahapaha, Pakaiea, Papahapaha, Sea Grass, Sea lettuce, Shih shun, Slender sea lettuce, Tahalib
Classification: Eukaryota, Phylum Chlorophyta, Order Ulvales, Family Ulvaceae.
AlgaeBase names and species:  n/a names - n/a current as of 12-2001.
Comprehensive lists of common names , generic & specific names can be found at AlgaeBase. >>Click here<<  for SuriaLink's policy on names.
SuriaLink SeaPlant Utility Rating
Developing aquaculture crop used for food & bioactive properties.
 Sometimes occurs as a "weed" in cultures of red seaweeds such as Kappaphycus and Eucheuma.
Bright green in colour. Double or multiple cell layer (in contrast to Monostroma). Slender at the holdfast and growing wider toward the apex. Fronds may be convoluted and have an appearance rather like lettuce. Reproduces seasonally; usually during tropical dry season or temperate spring.
Found in shallow sea water usually less than 1 m. in depth. generally grows on rocks, coral, mollusk shells or other hard substrate but also grows as an epiphyte on sea plants including crops such as Kappaphycus and Eucheuma.

Ulva production
click country to go to GIS
Tons per annum
wild harvest
Tons per annum
Argentina n/a n/a
Canada n/a n/a
China n/a n/a
Indonesia n/a n/a
Italy n/a n/a
Japan 1,500 n/a
Malaysia n/a n/a
Portugal n/a n/a
Philippines n/a n/a
USA n/a n/a
Vietnam n/a n/a


1,500 n/a
Approximate annual production figures from recent years are as above.
Biology & Agronomy
Can be cultivated somewhat in the manner of Monostroma and Porphyra.
Some species may contain bioactive substances such as those reported for Monostroma.
We have several monographs in progress covering analytical procedures post-harvest treatment and process technology. Check the processing index for available web pages and monographs. 
Products, Uses & Applications
Used as a sea vegetable, as aquarium feed or animal feed supplement, as an ingredient in nutraceutical mixtures and as an ingredient in topical preparations such as skin lotions used in spas.
List of species' uses and community affiliations
Genus GenID SpID Species Uses Communities
Ulva UL LAC lactuca FA, FH AI, SV, WB
Ulva UL PET pertusa MD SV, WB
Ulva UL RET reticulata FH SV, WB
Ulva UL SPP spp. FA, FH, IA, MD AI, SV, WB

click to relevant uses or communities on the index/legend table below>>>

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Ulva is most strongly associated with the Agri-Industry,  Seavegetables and Wellbeing  communities.
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