Common name: Gutweed

General information

Ulva intestinalis, commonly known as Gutweed, is a species of green algae that is widely distributed along the coasts of the world's oceans. It is characterized by its tube-like, hollow, and inflated fronds that resemble intestines, hence the name. This alga is part of the Ulvaceae family and is known for its rapid growth and ability to thrive in a variety of environmental conditions, including areas with high nutrient levels.

Care

Gutweed is relatively easy to cultivate in a reef aquarium, where it can serve as a natural nutrient exporter, helping to control nitrates and phosphates. It requires moderate to high lighting and good water flow to mimic its natural tidal habitat. Regular pruning is recommended to prevent it from overgrowing and potentially outcompeting other species in the aquarium.

Symbiosis

While not known for hosting or forming direct symbiotic relationships with marine animals, Ulva intestinalis does play a crucial role in the ecosystem. It provides a habitat for small invertebrates and serves as a food source for herbivorous fish and invertebrates.

Habitat

Ulva intestinalis is commonly found in intertidal zones, estuaries, and shallow waters where it attaches to rocks, shells, or other hard substrates. It can also be found free-floating or loosely anchored in calm bays and harbors. This species is tolerant of a wide range of salinities and can often be found in areas where freshwater meets the sea.