| Species | Name Used |
|---|---|
| Ulva lactuca Linnaeus, 1753 | Ulva lactuca (p. 56 ) |
| Urticina crassicornis (Müller, 1776) | Urticina crassicornis (p. 56 ) |
| Urticina lofotensis (Danielssen, 1890) | Urticina lofotensis (p. 56 ) |
| Urticina piscivora (Sebens & Laakso, 1978) | Urticina piscivora (p. 56 ) |