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Cake
sea star
Anthenea aspera
Family Oreasteridae
updated
Jul 2020
Where
seen? This large, flat sea star is often seen on our Northern shores. Smaller
ones are usually seen in seagrass meadows while larger ones are usually seen
on coral rubble, sometimes wedged under large rocks. It is usually seen
alone and usually more active at night. According to Lane, these sea
stars were previously only seen from samples dredged from the channel
between Pulau Ubin and Pulau Tekong. One was seen in a dive off Pulau
Semakau. They are considered rare in the Indo-Pacific (only known
from North Australia, southern Japan, China, Indonesia and Singapore)
and little is known about them. According to Marsh and Fromont, it is found on muddy sand in Australia.
Features: Diameter with
arms 10-20cm. Stiff body, the upperside usually slightly convex. Ams
are short with rounded tips. Large, neat marginal plates all around
the edges. The upperside is covered with tiny pedicellariae (pincer-like
structures). The underside is flat, usually with a pattern of bars
that form chevrons around the arms, with large bivalved pedicellariae.
The tube feet are short tipped with suckers. |
Changi, Jul 08 |
Upperside covered with tiny pedicellariae. |
Large marginal plates on the sides. |
Underside usually with barred pattern.
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Large bivalve pedicellarie on underside
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Cake sea stars come in
a wide variety of patterns and colours, from black, brown, red, orange,
yellow to even green.
Sometimes confused with the Biscuit
sea star (Goniodiscaster scaber). and the Spiny
sea star (Gymnanthenea laevis). Here's more on how
to tell apart large sea stars seen on our shores.
Status and threats: This star
is listed as 'Vulnerable' in the Red List of threatened animals of
Singapore. |
A young Cake
sea star with slender arms.
Changi, Jul 10
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A small one
with broad arms.
Chek Jawa, Aug 07
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A small one with
broad arms.
Pasir Ris Park, Jan 09
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Changi, Jul
08
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Tuas, Apr
08
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Chek Jawa,
Jul 08
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Cake
sea stars on Singapore shores |
Other sightings on Singapore shores |
Pasir Ris Park, Aug 09
Photo shared by Loh Kok Sheng on his
blog. |
Pasir Ris Park, Jan 20
Photo shared by Kelvin Yong on facebook. |
Changi, Aug 18
Photo shared by Loh Kok Sheng on facebook. |
Pulau Ubin, Dec 09
Photo shared by Loh Kok Sheng on his
blog. |
East Coast Park, Feb 16
Photo shared by Loh Kok Sheng on flickr. |
East Coast Park, May 21
Photo shared by Loh Kok Sheng on facebook. |
Cyrene Reef,
Jul 08
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Cyrene Reef,
Jun 10
Photo
shared by Loh Kok Sheng on his
blog. |
Links
References
- Loisette M. Marsh and Jane Fromont. Field Guide to Shallow Water Seastars of Australia. 2020. Western Australian Museum. 543pp.
- Lane, David
J.W. and Didier Vandenspiegel. 2003. A
Guide to Sea Stars and Other Echinoderms of Singapore.
Singapore Science Centre. 187pp.
- Didier VandenSpiegel
et al. 1998. The
Asteroid fauna (Echinodermata) of Singapore with a distribution
table and illustrated identification to the species. The Raffles
Bulletin of Zoology 1998 46(2): 431-470.
- Davison,
G.W. H. and P. K. L. Ng and Ho Hua Chew, 2008. The Singapore
Red Data Book: Threatened plants and animals of Singapore.
Nature Society (Singapore). 285 pp.
- Coleman,
Neville. 2007. Sea
stars: Echinoderms of Asia/Indo-Pacific. Neville Coleman's
Underwater Geographic Pty Ltd, Australia.136pp.
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