Below are images of brown seaweeds, other than fucoids that come under the generic term 'wracks'. There are more species than shown here, as only those for which I have photos are shown.
|Thong weed (Himanthalia elongata) is olive brown with long strap like dichotomous branching fronds. Himanthalia elongata occurs at the low water mark and into the shallow subtidal.|
|Thong weed (Himanthalia elongata) fully submerged.|
|Early growth stages of Thong weed (Himanthalia elongata) from which the long fronds grow.|
|Bifurcaria bifurcata is a brown seaweed with cylindrical dichotomous branching fronds. Bifurcaria bifurcata occurs in rock pools of the lower shore.|
|Bifurcaria bifurcata and Sargassum muticum can dominate lower shore pools.|
|Rainbow wrack (Cystoseira tamariscifolia) is an iridescent bushy weed found in pools of the lower shore. There are a number of 'bushy' wracks belonging to the genus Cystoseira in the UK.|
|Sea Oak (Halidrys siliquosa) has alternate branching with oblong air bladders. It occurs in pools of the lower shore and shallow sublittoral.|