What is "ulvaria"

Ulvaria is a genus of green algae in the family Monostromataceae. It is similar to Ulva, but rather than being two cells thick, it is only one, despite its darker colour.

Ulvaria may refer to:

• Ulvaria (fish), an animal genus in the family Stichaeidae
• Ulvaria (alga), a plant genus in the family Ulvaceae