learn only 3 things about them ...
They are found among the coral rubble. Don't step on them!
Don't remove any fishes or shrimps that live in the sea
anemone. They will die and the anemone will also suffer.
poke the sea anemone to make fishes or shrimps come out.
They will instead hide deeper in the anemone.
seen? This sea anemone with bulbous tips is sometimes seen
on some of our shores. Usually nestled among coral rubble with the
body column deep in a crevice or hole and only the tentacles sticking
it is often mistaken for a hard coral.
Sometimes, several small ones are seen clustered together. Larger
ones are usually alone, and found in deeper water.
of sea anemone with tentacles extended 10-20cm although large ones
about 30-40cm have been seen. Tentacles 4-6cm long. The tentacles
may have bulbous tips (although not always).
There may be a white 'equator' around the bulbous portion. When not
inflated, the tip is then blunt with a white ring where the 'equator'
to Dr Fautin, the bulbous tip seems related to presence of anemonefish,
and can disappear.
column smooth with no verrucae, colour brown, reddish or orange, but
is rarely seen as it is usually deeply inserted into crevices. It
has a small pedal disc.
Be careful! Like other sea anemones,
this anemone has stingers in its tentacles that can inflict a painful
Bubble friends: The anemone harbours
symbiotic algae (called zooxanthellae) that produces food through
photosynthesis. The food produced is shared with the anemone, which
in turn provides the algae with shelter and minerals.
Several kinds of animals are said to live happily among and unharmed
by the tentacles of bubble tip anemones. These include anemone
(Periclimenes sp.) these
fishes: Dascyllus trimaculatus and Premnas biaculeatus and
(Amphiprion sp.) including A. akindynos, A. biaculeatus,
A. bicinctus, A. chrysopterus, A. clarkii, A. ephippium, A.
frenatus (Tomato anemonefish), A. fuscocaudatus, A. latezonatus,
A. melanopus, A. polymnus (juvenile). So
far, only the Tomato anemonefish has been seen on the bubble tip anemones
on the intertidal.
Human uses: Unfortunately, this
beautiful sea anemone is collected for the live aquarium trade.
Status and threats: Bubble tip
anemones are not listed among the threatened animals of Singapore,
but the anemone fishes that rely on them are on the Red List. However,
like other animals harvested for the live aquarium trade, most die
before they can reach the retailers. Without professional care, most
die soon after they are sold. Those that do survive are unlikely to
breed successfully. Like other creatures of the intertidal zone, they
are affected by human activities such as reclamation and pollution.
Trampling by careless visitors, and over-collection also have an impact
on local populations.
lives with this sea anemone
Pulau Semakau, Aug 08
Sisters Islands, Apr 04
Kusu Island, Aug 04
Terumbu Semakau, Jun 12
Sisters Island, Jun 07
Sisters Island, May 12
sea anemones on Singapore shores