Bryopsis
slug
Placida sp.*
Family
Limapontiidae
updated
Jun 2020
Where
seen? This superbly camouflaged slug is actually quite
common on many of our shores, particularly when there is a bloom of Bryopsis
seaweeds. At this time, lots of them can be seen even in a small
clump of seaweed. But they are really hard to spot.
Features: Tiny,
to about 1cm. Long, soft body with lots of finger-like projections
(cerata) that are transparent. The digestive system extends into the
cerata, and the green stuff is the seaweed 'juices' sucked up by the
slug. Some have a white stripe along the upperside of the body. There
is also a pattern of little lines on the sides of the body. Pale narrow
foot. One pair of long rhinophores, no oral tentacles.
The egg mass is coiled, sausage-shaped mass and very sticky.
Two species are recorded for Singapore: Placida daguilarensis and Placida dendritica |
Sometimes seen in large numbers.
Sisters Island, May 12 |
Sentosa, Nov 03 |
Sometimes seen floating
upside down on the water surface.
Sisters Island, May 12
|
Tiny white one, perhaps it hasn't
eaten enough seaweed yet?
Sentosa, Aug 04
|
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*Species are difficult
to positively identify without close examination.
On this website, they are grouped by external features for convenience of
display.
Bryopsis
slugs on Singapore shores |
Other sightings on Singapore shores |
Changi, May 17
Photo shared by Heng Pei Yan on facebook. |
Changi Carpark 7, Jun 23
Photo shared by Kelvin Yong on facebook. |
|
Chek Jawa, May 16
Photo shared by Toh Chay Hoon on facebook. |
Beting Bronok, Jul 19
Photo shared by Toh Chay Hoon on facebook. |
|
East Cost Park, Aug 18
Photo
shared by Toh Chay Hoon on facebook. |
Sentosa Serapong, May 12
Photo
shared by Loh Kok Sheng on flickr. |
Kusu Island, Apr 17
Photo
shared by Toh Chay Hoon on facebook. |
Pulau Hantu, May 19
Photo
shared by Toh Chay Hoon on facebook. |
Cyrene Reef, Aug 15
Photo
shared by Toh Chay Hoon on facebook. |
|
Terumbu Pempang Tengah, May 11
Photo
shared by Rene Ong on facebook. |
Terumbu Pempang Laut, May 17
Photo
shared by Toh Chay Hoon on facebook. |
Terumbu Selegie, Jan 17
Photo shared by Toh Chay Hoon on facebook. |
Pulau Salu, Apr 21
Photo
shared by Toh Chay Hoon on facebook. |
|
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Links
References
- K. R. Jensen. Sacoglossa (Mollusca: Gastropoda: Heterobranchia) from northern coasts of Singapore. 10 July 2015. The Comprehensive Marine Biodiversity Survey: Johor Straits International Workshop (2012) The Raffles Bulletin of Zoology 2015 Supplement No. 31, Pp. 226-249.
- Kathe
R. Jensen. 30 Dec 2009. Sacoglossa
(Mollusca: Gastropoda: Opisthobranchia) from Singapore. The Raffles Bulletin of Zoology, Supplement 22: 207-223.
- Tan Siong
Kiat and Henrietta P. M. Woo, 2010 Preliminary
Checklist of The Molluscs of Singapore (pdf), Raffles
Museum of Biodiversity Research, National University of Singapore.
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