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Pulau Semakau

Singapore · Singapore

What have people found?

Doughnut doto, icon sea star and onyx cowrie turn up here more than at our other rock pools. Blue dragon, porites-eating nudibranch and black-margined nudibranch are the usual finds. ~434 distinct species have been recorded here, across at least 7 years of observations.

What is the best time to visit today?

Download the app to see the 7-day schedule.

See low tide times at Pulau Semakau for the next three days
  1. Mon 16 Nov~8:30in the dark~22:30
  2. Tue 17 Nov~9:30in the dark~23:30
  3. Wed 18 Nov~11:30

Every low tide each day, in local time at the shore.

Plan the week in Intertidal
  • A tide chart for every day, with the best window marked
  • Identify what you find from a photo
  • An alert when a good daylight low is coming

When do people visit?

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Most observations come from March and June.

What should you know before visiting?

Arrive 45 minutes to an hour before low tide and leave as it turns. The water comes back faster than it left.
Grippy shoes beat sandals. Wet rock and algae are more slippery than they look. Rock pool safety
A rock pool is a fragile place. Look and photograph, take nothing. The rockpooling code

What lives at Pulau Semakau?

Species records from iNaturalist

Blue DragonPteraeolidia semperi
Porites-eating NudibranchPhestilla sibogae
Black-margined NudibranchDoriprismatica atromarginata
Slender ceratosoma nudibranchCeratosoma gracillimum
Noble VoluteCymbiola nobilis
Ocellate PhyllidiaPhyllidia ocellata
Doughnut DotoDoto greenamyeri
Icon Sea StarIconaster longimanus
Thranita spinimanaThranita spinimana
Indo-Pacific Sand StarArchaster typicus
Onyx CowrieErronea onyx
Doto gaeliDoto gaeli
Papuan CuttlefishAscarosepion papuense
Bullock's HypselodorisHypselodoris bullockii
Walker's cowrieContradusta walkeri
Scan this rock pool on your next visit.

Every organism named, every visit logged to your journal.