Caulerpa trifaria

Caulerpa trifaria is a species of seaweed in the Caulerpaceae family.

The seaweed has a slender stolon and green fronds that typically grow to 5 to 25 cm in height with a width of 4 to 12 mm.

The species is usually found in calm sheltered waters at depths of 2 to 30 m. In Western Australia, it is found along the coast around Perth extending south to around Esperance. It is also found in Victoria and Tasmania.