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Snail-hitching
anemone
Awaiting
identification
updated Nov 2019
Where
seen? This tiny anemone is sometimes seen stuck onto shells
occupied by living snails such as whelks (Family Nassaridae). Sometimes also seen attached to tiny stones in
silty sandy shores. They are more frequently encountered on our Northern
shores, but also sometimes seen on other shores.
Features: Diameter with tentacles
extended 1-1.5cm. Tentacles many, long and thin, usually transparent
with white bands. On the oral disk, often fine white stripes radiating
from the mouth. Sometimes, a pair of tentacles are of a contrasting colour so that
the anemone appears to have a moustache. Body column
brown with pale stripes. Sometimes, a single single shell may bear
two or three of these anemones. When full expanded, these anemone
hitch-hikers may be bigger than the snail they are riding on!
There are also small anemones that hitch a ride on a
shell occupied by a hermit crab.
Paraiptasia radiata (Family Aiptasiidae) is a small
anemone (about 1cm tall) often seen on a snail. It has a striped body
column and finely striped oral disk. |
Pulau Sekudu, May 08
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Chek Jawa, Jul 11
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Anemones stick out when snail is buried.
Chek Jawa, Jul 11
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Woodlands, Jul 08
Woodlands, Jul 08
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Kranji, Jul 09
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Not attached to snails.
Kranji, Jul 09
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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.
Snail-hitching
anemones on Singapore shores |
Other sightings on Singapore shores |
Sisters Island, Aug 09
Photo
shared by Loh Kok Sheng on flickr. |
Punggol, Sep 18
Photo shared by Dayna Cheah on facebook.
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Pulau Sudong, Dec 09 |
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Kranji, Mar 17
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References
- Daphne Gail
Fautin, S. H. Tan and Ria Tan. 30 Dec 2009. Sea anemones (Cnidaria:
Actiniaria) of Singapore: abundant and well-known shallow-water
species. Raffles Bulletin of Zoology Supplement No. 22: 121-143.
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