The reefs of Kusu Island are just across from the main business district on the mainland.
NOAA's coral reef watch satellite monitoring, Singapore is in the yellow Watch zone. Where we should be prepared for mass coral bleaching.
What is coral bleaching?
Coral are colonies of tiny animals called polyps. Each polyp lives inside a little hard skeleton. The huge colony is made up of the skeletons of countless polyps. The polyps of all reef-building hard corals harbour microscopic, single-celled algae (called zooxanthellae). The polyp provides the zooxanthellae with shelter and minerals. The zooxanthellae carry out photosynthesis inside the polyp and share the food produced with the polyp. Corals generally have white colour skeletons, which is believed to assist in photosynthesis by reflecting light onto the zooxanthellae.
leathery soft corals were bleaching. About 50% seemed alright. I also saw some clumps of Asparagus flowery soft corals that were not bleaching.
Magnificent sea anemones and none of them were bleaching. There were also many Haddon's carpet anemones and Giant carpet anemones and I only saw a few bleaching.
Acorn worm! It was already burrowing back into the sand, so after a few photos, we left it alone. At sunrise, we no longer saw it on the shore.
Spoon seagrass (with tiny leaf blades), two small clumps of Tape seagrass outside the seawall, and some patches of Needle seagrass too.
Knobbly sea star in the seagrass meadows.
High res photos of mass coral bleaching in Singapore for free download on wildsingapore flickr
Others on this trip: Jonathan Tan, Yi Feng, Nicholas Yap.