They contain only one nucleus in their vegetative stage, which remains in the bottom of the cell in the holdfast at the substrate.
On 31 December 1836 the Holdfast Bay settlement was renamed Glenelg.
It is usually anchored to the seabed or the prop roots of the red mangrove Rhizophora mangle by a holdfast, but it sometimes forms loose masses which roll about with the movement of the water.
One of their final shows was at the Holdfast Hotel in Glenelg and two more shows were scheduled to accommodate all the fans.