seen? This little busy spider is commonly seen on many
of our shores at low tide: on rocky shores, coral rubble areas and
reefs. This spider was described from Singapore and the type specimen
was collected at the coral reefs fringing the island now known as
Features: Body to about 1cm long.
Its head and huge jaws are smooth maroon, body and legs are furry,
greyish sometimes with a pink tinge. At high tide, it hides in air
pockets among crevices of submerged rocks, waterproofing these with
a mat of silk. It emerges at low tide to hunt. It can 'walk' on water,
scuttling rapidly over the water. Its long legs distributes its weight
and hairy feet prevents it from breaking the water surface tension.
What does it eat?
These spiders have been seen clutching in their jaws: shore
slaters and little shrimps.
Baby spiders: Egg cocoons are
placed in waterproofed tubes sealed with silk.
Status and threats: The Marine
spider is listed as 'Vulnerable' on the Red List of threatened animals
According to the Singapore Red Data Book: "Loss of the natural
intertidal zone in reefs and rocky shores would threaten its survival."
Caught a shrimp
almost as big as itself!
Tuas, May 05
a shore cricket.
Kusu Island, Apr 08
Terumbu Bemban, Jul 11
shared by Loh Kok Sheng on his
a Sea slater?
Sentosa, Mar 05
spiders on Singapore shores
Desidae recorded for Singapore
Wee Y.C. and Peter K. L. Ng. 1994. A First Look at Biodiversity
in red are those listed among the threatened
animals of Singapore from 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.
martensi (Reef spider) (VU:Vulnerable)
on Singapore Red Data Book 2008 on the NParks website (pdf).
romance on The Annotated Budak: Marcus Ng shares some history
about the discovery and thoughts about this spider.
- Wee Y.C.
and Peter K. L. Ng. 1994. A First Look at Biodiversity in Singapore.
National Council on the Environment. 163pp.
- Ng, P. K.
L. & Y. C. Wee, 1994. The
Singapore Red Data Book: Threatened Plants and Animals of Singapore.
The Nature Society (Singapore), Singapore. 343 pp.
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.