Club Snap visits Pulau Salu
Secret lives and secret worlds hidden in Singapore's most popular coral reef.
Coral Watch, a non-profit research organization based at the University of Queensland, Australia, has joined forces with Project AWARE, a non-profit environmental organization dedicated to conserving our underwater environment through education, advocacy and action. Together the organizations hope to inspire all divers, snorkellers and reef walkers to take action and monitor their reefs.
With your help it will be possible to monitor coral health over a period of time. If reefs are regularly checked and data submitted the information contributed by dive centres will help establish what factors influence coral health throughout the year.
For more information, check out the following sites:
PADI Environmental News
Bleaching of hard corals has been spotted at Kusu Island and Permalang Reef recently. If you have seen bleaching occuring anywhere else at the Southern Islands, please send any of the following information you might have to firstname.lastname@example.org:
1. Location of reef (Reef name or location in relation to nearest island),
3. % of the colony bleached,
4. % of the reef bleached,
5. If possible, the species of coral bleached,
What is bleaching?
Bleaching occurs when hard corals (or anemones, or soft corals, etc) eject their symbiotic algae (the zooxanthellae) from their tissues, leaving them almost colourless. Bleached hard corals look white as you can see the underlying skeleton through the coral tissues. Bleached corals are NOT dead, if you look closely you should be able to see the coral polyps.
What causes bleaching? Will the corals die?
We don't really know the exact causes of bleaching, but it has been correlated with raised seawater temperatures and other environmental stresses. If the stresses are removed, corals can recover and regain their colours, if left bleached for too long, they might starve and die off.
The Purple Climber Crab, Metopograpsus sp. is a small ferocious crab which preys on grazers and filter feeders that live amongst the rocks.
These purple-coloured crustaceans crowd into crevices in the rock at low tide during the day - you'll rarely see more than a hairy leg sticking out of a crevice! They are active at night, you see.
These agressive crabs will attack and eat any prey they can overcome. They can even give you a nasty pinch!
This individual was photographed hiding between the concrete slabs near the waterline at the Hantu Kecil jetty. It was quite sensitive to our movement and quickly concealed itself when it detected us. Happily, it holed up into a corner and I stole this shot!
Extracted from the Chek Jawa Guidebook