Some seaweeds of Ireland’s east coast

Sea Oak

Halides Siliquosa

(Brown św) Specimens over 1m. Long thallus, compressed fronds, air bladders like mustard seed pods.

Serrated Wrack

Fucus Serratus (Brown św) Specimens around 35cm and bushy. Flattened fronds with mid-rib and serrated edges. No bladders.

Bladder Wrack

Fucus Vesiculosus (Brown św) Specimens around 30cm. Fronds flat with mid-rib branch to give bushy effect. Egg-like air bladders in pairs either side of minor branches

Knotted Wrack

Ascophyllum Nodosum (Brown św) Specimens 100cm. Long flattened fronds have no mid-rib. Large egg-shaped air bladders within the main frond and smaller ones attached by stems.