Common name: Sea Lettuce

General information

Ulva linza, commonly known as Sea Lettuce, is a bright green macroalgae that is not only popular in marine aquariums but also studied for its ecological importance and potential in biofuel production. This species is part of the Ulvaceae family and is characterized by its sheet-like, ruffled thallus which can vary in size. It is often found in intertidal zones and shallow waters where it can attach to substrate or exist as free-floating mats.

Care

Sea Lettuce is relatively easy to cultivate in a marine aquarium, requiring moderate to high lighting to thrive. It prefers strong water movement which helps to deliver nutrients and remove waste products. This macroalgae can be a great nutrient exporter, absorbing excess nitrates and phosphates from the water, which helps to maintain water quality and reduce the likelihood of nuisance algae blooms.

Symbiosis

While not hosting symbiotic fauna like some corals or anemones, Sea Lettuce can provide a habitat for small invertebrates and serves as a food source for herbivorous fish and invertebrates. It plays a role in the ecosystem by providing oxygen and acting as a nursery area for juvenile fish.

Habitat

Ulva linza is found in a variety of marine environments from brackish waters to fully marine conditions. It is commonly seen in areas with nutrient-rich waters, such as estuaries and nearshore environments. This species is tolerant of a wide range of temperatures and salinities, which contributes to its widespread distribution.