Water Framework Directive species for Wales
| Alaria esculenta | Brown | (Linnaeus) Greville | (edible wing) dabberlocks |
| Ascophyllum nodosum | Brown | (Linnaeus) Le Jolis | (egg wrack, wind-skin leaf with nodules) |
| Chorda filum | Brown | (Linnaeus) Stackhouse | (chord weed) |
| Dictyota dichotoma | Brown | (Hudson) Lamouroux | (equally divided net weed) |
| Fucus serratus | Brown | Linnaeus, 1753 | saw wrack, toothed wrack |
| Fucus spiralis | Brown | Linnaeus | (spiraled wrack) |
| Fucus vesiculosus | Brown | Linneaus | (seaweed full of bladders), bladder wrack |
| Halidrys siliquosa | Brown | (Linnaeus) Lyngbye | (sea oak) |
| Himanthalia elongata | Brown | (Linnaeus) S Gray | (thong weed) |
| Laminaria digitata | Brown | (Hudson) Lamouroux | (oar weed, tangle) |
| Laminaria hyperborea | Brown | (Gunnerus) Foslie | (red kelp, rough stiped kelp) |
| Laminaria saccharina | Brown | (Linnaeus) Lamouroux | (sugary thin plate weed) |
| Leathesia difformis | Brown | (Linnaeus) Areschoug | (Rev. Leathes deformed globe weed) |
| Pelvetia canaliculata | Brown | (Linnaeus) Decaisne et Thuret | (Pelvet's channelled weed), channel wrack |
| Saccorhiza polyschides | Brown | (Lightfoot) Batters | (sack root), furbellows |
| Bryopsis plumosa | Green | (Hudson) C Agardh | (mossy feather weed) |
| Ulva lactuca | Green | Linnaeus | (marsh lettuce), sea lettuce |
| Ahnfeltia plicata | Red | (Hudson) Fries | (Ahnfelt's folded weed) |
| Callophyllis laciniata | Red | (Hudson) Kützing | (divided beautiful red leaf, red wedge weed) |
| Catenella caespitosa | Red | (Withering) L Irvine | (creeping chain weed) |
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