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Seaweeds > Division Chlorophyta > Avrainvillea species
Solitary fan green seaweed
Avrainvillea erecta*
Family Udoteaceae
updated Jan 12

Where seen? These solitary stalked green fans are sometimes seen on some of our shores, sticking out of the ground here and there. Usually in coral rubble areas.

Features: A paddle-shaped blade (4-5cm wide), usually growing alone, sometime a few near one another. The blade is flat and not ruffled. The flexible blade is made up of a tangle of tiny filaments that give it a velvety texture. The blade is held up on a stiff stalk that may be buried in sand or wedged into crevices.
The stalk can be quite long (up to 10cm long), with only a short portion sticking out above the surface. Sometimes, the single blade is divided into three or four 'wings'. Usually dark green sometimes with pale or yellowish edges.

Tuas, Jun 05
Sometimes, tiny Strawberry slugs (Costasiella sp.) are found on this seaweed.

Sometimes confused with the Clustered fan green seaweed (Avrainvillea sp.) which is found in clusters and not alone, and the Frilly fan green seaweed (Udotea sp.) which has frilly blades.

Tiny slug found on the seaweed.
Tanah Merah, Dec 09

Solitary fan green seaweeds on Singapore shores


Kusu Island, Jun 05

Chek Jawa, May 05

Pulau Sekudu, Jan 06

more photos of solitary fan green seaweeds on Singapore shores
northern shores
southern shores part 1 | part 2 | part 3


*Species are difficult to positively identify without close examination.
On this website, they are grouped by external features for convenience of display.

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