Seaweeds > Division Chlorophyta
Photo index of green seaweeds on Singapore shores
Feathery, serrated strips




Taxifolia
feathery seaweed

Caulerpa taxifolia



Mexican
seaweed

Caulerpa mexicana



Delicate
feathery seaweed

Caulerpa setularioides



Zipper
seaweed

Caulerpa cupressoides



Scalpel seaweed
Caulerpa scalpelliformis
3-7cm. Central 'stem' flat, side 'branches' long, flat, broad, sickle shaped with pointed tips. Bright green. On coral rubble and sandy bottoms. Medium clumps, does not cover large areas. Commonly seen on many of our shores. About 2cm. Central 'stem' flat as wide or wider than length of side 'branches' short, flat with pointed tips. Bright green. On rocks. Small patches on some of our Southern shores. 5-7cm. Central 'stem' cylindrical, side 'branches' long, cylindrical with pointed tips. Bright to olive. On coral rubble, sand, among seagrasses. Medium clumps, does not cover large areas. Sometimes seen on some of our shores. 4-6cm, Central 'stem' flat, broad, thin. Side 'branches' very short with pointed tips. Dark to olive green, sometimes bluish. Small clumps on coral rubble. Sometimes seen on our shores. 2-4cm. Central 'stem' flat as wide or wider than length of side 'branches' short, flat with rounded tips. Olive green. On sand among seagrasses. Small patches on some of our Southern shores.
         



Serrated green
seaweeds

Caulerpa serrulata



Bottlebrush
green seaweed

Caulerpa webbiana



Fluffy
green seaweed

Caulerpa verticillata
   
4-6cm, often tightly coiled. Central stem flat but thick, with serrated edges of blunt spikes. Bluish or greyish green. Small clumps on coral rubble. Sometimes seen on some of our shores. Bristly 'stem' about 4-6cm long with tiny bristles arranged around the 'stem' to give the appearance of a bottlebrush. Among seagrasses, on coral rubble. Olive green. Sometimes seen on our Southern shores. Short 'stem' (1-2cm) made up of circlets of short filaments. On sand and rubble, sparse clumps about 10-20cm wide. Sometimes seen on some of our shores.    
       
NOT seaweed

Hairy
seaweed

Bryopsis
sp.

Fuzzy green seaweed
Boodlea
sp.
   

Fern seagrass

Halophila spinulosa
Clump of filaments medium length (6-8cm). Filaments fine straight and hair-like or feather-like. May be seasonally abundant. Shades of green, sometimes bluish or olive. On coral rubble, sometimes sandy areas. Commonly seen on many of our shores. Clump of filaments medium length (4-5cm). Filaments fine, short, branching in all directions. Near reefs. Sometimes seen on some of our shores.     2cm wide, 4cm long. Only seagrass with opposite leaves on a stem that makes it appear fern-like. 10-20 opposite pairs of leaves on one stem, the stem about 4cm long. Rhizomes thin, sometimes woody. Common on Chek Jawa and Changi.

how to tell apart

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photo index of
seaweeds on this site
all seaweeds

Green seaweeds


sheets, ribbons, filaments

feathery,
serrated strips


spheres, sausages, blobs

fans, disks, branched

Red seaweeds

sheets, ribbons


fleshy stems, beads

soft hairy, feathery


hard branching, encrusting

Brown seaweeds

sheets, ribbons


disks, other shapes
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