14 January 2013
Dugong signs on Changi with sea fan garden
Dugong feeding trails on mainland Changi! These characteristic furrows show that dugongs have been feeding on the seagrasses here recently.
The tide was lower than we expected, but still not low enough to clearly see the sea fans (Order Gorgonacea) that grow on the rockier parts of this shore. Sea fans can grow in murky water because they don't have symbiotic algae that rely on photosynthesis. We had a much better look at the sea fans during a good low tide in Jul 2012.
Winged oysters (Family Pteriidae) which are only found on sea fans. Also, a strange white thread-like thing wound around this sea fan. I have no idea what it is. Kok Sheng found a strange clam on a sea fan too. I didn't see any ovulid snails though.
sponges of all kinds, including Zebra corals (Oulastrea crispata) and Cave corals (Tubastrea sp.). The sponge variety at Changi seems quite different from those we saw at Punggol the day before. So every shore in Singapore is precious!
Biscuit sea stars (Goniodiscaster scaber), some large Haddon's carpet anemones (Stichodactyla haddoni), many Swimming anemones (Boloceroides mcmurrichi), several Thorny sea cucumbers (Colochirus quadrangularis), Warty pink sea cucumbers (Cercodemas anceps) and buried Ball sea cucumbers (Phyllophorus sp.). The rest of the team also found two frogfishes and an octopus!
Luidia sea star (Luidia sp.) which I don't often encounter. It is a burrowing sea star and has pointy tube feet on the underside. Like other Luidia sea stars, it has pretty star-shaped structures on the upperside.
Hairy sea hares (Bursatella leachi) which are easy to overlook for seaweeds.
Button zoanthids (Zoanthus sp.). Our last trip here was in Jul 2012 and the shore seems to be doing ok.
Dec 2008. I suspect 'beach improvement' has also happened on another Changi shore in Aug 2012.
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