Phylum Porifera
Orange sprawling sponge
Clathria reinwardti*
Family Microcionidae
updated Dec 11

Where seen? This large sprawling bright orange sponge is commonly seen on some of our Southern shores, growing in sheltered shores on coral rubble in or near seagrass areas and in man-made lagoons on our Southern Islands.

Features: Often looks like sprawling tree roots, branching and spreading horizontally along the surface. Stems may be slender, long, angular and sparsely branched, or short and regularly branched with short upright portions. Or series of flattened upright lobes. Also combinations of these different shapes in the same sponge. Texture smooth with a semi-translucent surface skin that collapses when out of water to form folds and ridges.

At intervals along the top portion of the sponge there are lumps or short fat cones with small holes (0.5cm) at the tips. The holes have membranous lips and water channels radiate from these holes. The holes are more obvious when the sponge is submerged. Out of water, the hole are closed as the lips collapse, and the area around it puckers into rdiges. Colour usually bright orange, also paler orange.

Pulau Semakau, Mar 05

Pulau Hantu, May 09

Cone with holes at the tip.

Hole with membranous lips and
water channels radiating out from the hole.

Orange sprawling sponges on Singapore shores

Cyrene Reef, Dec 08


Pulau Hantu, Feb 06


Pulau Semakau, May 07

Cyrene Reef, Jun 08

Beting Bemban Besar, Jun 09

more photos of orange sprawling sponges on Singapore shores
part 1 | part 2 | part 3

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

References

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