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sponges
text index | photo
index
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| Phylum Porifera |
| Blue
jorunna sponge Neopetrosia sp.* Family Petrosiidae updated Dec 11 Where seen? This bright blue sponge is sometimes seen on some of our shores. On coral rubble. Features: About 6-10cm sometimes larger. Is generally encrusting, with small (5cm in diameter) knobs and bumps all over. Each knob or lump has a large hole at the tip. Texture somewhat rough. Usually electric blue. It appears to be among the favourite food of the Polka-dot jorunna nudibranch (Jorunna funebris) and this nudibranch is often seen laying egg masses near the sponge. |
 A pair of the nudibranchs near the sponge. Pulau Sekudu, Jun 06 |
 Chewed up sponge Pulau Sekudu, Jun 06 |
 Closer look at the egg mass. Pulau Sekudu, Jun 06 |
Blue jorunna sponges on Singapore shores
 St. John's Island, Jun 07  The nudi was seen next to a chomped up blue sponge. |
 Pulau Sekudu, Jan 06  |
 Labrador, Jul 05  |
more photos of blue jorunna sponges on Singapore shores
northern shores
southern shores part 1 | part 2 | part 3 | part 4
*Species are difficult to positively identify without close examination.
On this website, they are grouped by external features for convenience of display.
Links
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Sea Challengers. 314pp.|
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