Sea
pencil
Lituaria sp.
Family Veretillidae
updated
Dec 2019
Where
seen? Resembling a white nose inhaler, this colony of animals on a stick is often
seen on some of our Northern shores. Among seagrasses and in sandy
areas near seagrasses. Sometimes in large numbers, especially in the
dark. At sunrise, most are retracted into the ground. Elsewhere, these sea pens are found in deeper waters.
Features: 4-10cm long. Cylindrical
white primary polyp that is stiff with a blunt rounded tip. No leaf-like
structures. The secondary polyps emerge directly from the primary
polyp and are transparent with long body columns (about 1cm) and long
branched tentacles. |
Changi, May 11 |
Changi, May 11.
Chek Jawa, Jul 05
|
Half dead specimen washed ashore.
Skeleton
of the central stalk
Changi, May 06
|
Pencil snacks? The Armina nudibranch eats sea pens, and sometimes, they can be seen near sea pencils. |
*Species
are difficult to positively identify without close examination.
On this website, they are grouped by external
features for convenience of display.
Sea
pencils on Singapore shores |
Other sightings on Singapore shores |
Coney Island, Jun 18
Photo shared by Richard Kuah on facebook. |
Pulau Ubin, Jul 17
Photo shared by Loh Kok Sheng on facebook. |
|
Tanah Merah, Aug 09
Photo shared by Loh Kok Sheng on his
flickr. |
Tanah Merah Ferry Terminal, Jun 15
Photo shared by Loh Kok Sheng on facebook. |
Tuas, Dec 14
Photo shared by Loh Kok Sheng on his blog. |
Acknoweldgements
Grateful thanks to
Dr. Bjorn Berning and Dr Dennis P. Gordon for identifying this sea pen.
Links
References
- Erhardt,
Harry and Daniel Knop. 2005. Corals:
Indo-Pacific Field Guide IKAN-Unterwasserachiv, Frankfurt. 305 pp.
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