Passer au contenu principal

Sea lettuce

SIZE: 

From 15 cm to 30 cm, up to 50 cm.

LIFE EXPECTANCY : 

Less than a year.

LIFE CYCLE: 

The ulvae reproduce by releasing male or female cells that fuse to form a new alga.

Sea lettuces are small in the spring. They develop mostly during the summer when the water is warm. Growth takes place at the extremities, either the holdfast or the fronds. In fact, they don’t even need to be attached to the substrate to grow.

 

Coastal zone, up to 10 m in depth, in salt or brackish waters.

Sea lettuce prefers calm, moderately exposed environments, because it detaches easily.

 

Photographie sous marine de laitues de mer.
It is a rather dispersed algae. You will not find it grouped together in dense underwater forests.
Credit : Éric Tamigneaux

PREYS:

CO2
Solar energy

PREDATORS:

Herbivorous molluscs
Shrimps

MACHINES: 

Hand harvesting.

REGULATIONS:

Harvesting requires a permit.

May to December in the Gaspé Bay and May to June in Haute-Gaspésie.

Only every second frond can be harvested at low tide in the inter-tidal zone.

Photographie d'une feuille d'algue verte hors de l'eau.
The picker can only harvest every other frond in the intertidal zone at low tide.
Credit : Éric Tamigneaux

Sea lettuce is a Smarter seafood listed species.

BENEFITS:

Sea lettuce is rich in protein, vitamin B12, iron, calcium, and magnesium. It also contains starch and a good quantity of fiber.

It can also be used as a natural fertilizer, thanks to its high nitrogen and phosphorus content.

LET’S COOK: 

Fresh, full-bodied taste. Its flavor is similar to that of spinach, with an added hint of the sea. Its texture is tough when raw, but softer when cooked.

OUR CULINARY ADVICE: 

  • Freshly picked, sea lettuce can be consumed directly, thinly sliced; for example in salads, sauces or in soups.

The waters of the St. Lawrence River are known for their good quality. However, like other algae, sea lettuce absorbs elements from the water in order to grow. It is best to ensure that the harvesting site is clean before eating it fresh.

Mirror, mirror

Sea lettuce is so named for its culinary qualities and its shape, which are very similar to that of lettuce leaves.

This site is registered on wpml.org as a development site.