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Saturday, May 21, 2011

Super low tide at Changi!

Yes, as many of you have heard or know, I was slated to have a pre-thesis presentation on the same morning of Changi trip. But hey! It was in the afternoon, but it was too good to miss a super low tide on one of my favourite shores! :)

Beautiful sunrise at 6am... :)

The entire trip was just dominated by snails due to its sandy substrate... And the most special snail for me would be this Cassidae snail... This is the Japanese Bonnet Snail.

Looking so pretty and cute, it is in fact a ferocious predator feeding on mostly echinoderms...


Without our slug expert, we only managed one nudibranch that James found burrowing itself in the sand... The Armina nudibranch, a more special individual here has 'bushy'-like mouth unlike the usual counterparts.

Fishy encounters include this common Schaaps dragonet on Changi beach... With its rather flathead, it was easy to mistaken them.

Alas, we did not see any seahorses, even though the team saw many of them just the day before on a different location. The only Syngnathidae was this green pipefish hiding amongst the Ulva seaweed.

Newborn Mangrove whip rays were swimming about! They are just so adorable when small... When big, they can be a terror when stung by their hidden barbs. Ivan and I counted up to 5 of them in the shallow pool! Swimming and settling around our feet... Looks like we have new rays to terrorise us sooner than expected!

Star-studded was definitely a phrase to describe Changi... Small pink-spined urchins...

Knobbly babies came out to play! Kok Sheng spotted a reddish brown one...

Ivan spotted this tiny green one!

The black urchins seem to be back on the shores... According to Kok Sheng, these voracious urchins feed on the invasive zebra mussels.

Looking similar to the black urchins, the white Salmacis urchins are fashion 'disasters'! haha... Looking at the kind of materials they used to decorate themselves, we sure think they look like flotsam...

Pink sand dollars
seem to be really common now! In fact, the gray sand dollars seem to have dwindled in numbers... Wonder what these pink ones eat...

Thorny sea cucumbers are still doing well on the shores...

The only orange spiny seastar...

Healthy flowery sea pens....

An uprooted spiny sea pens with their painted porcelain crab commensals... :) A proud mama below!

I didn't see much anemones except this Peachia sp.?

Glass anemone??

Crustaceans included this green shrimp...

Moon crab...

Anemone shrimp... Both the female and male...


Sadly I did not get my chance to see the spotted box crab. However, just after I left, the team found one on the upper shore! >:(

Just my luck! But it seems like there is a population of them on the beach since carapace and broken arms could be found...


Sadly there isn't many low tides left for the year to explore the Northern shores properly. I hope to go back soon! :)

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