Thursday, December 23, 2010

101223 Punggol

A new shore that reveals new things. We started by exploring the west side of the jetty and moved eastwards.

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Small black bivalves encrust some of the boulders. No idea what they are.

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Green mussels (Perna viridis). Many of the boulders were thick with them. I wonder if its natural or a result of animal releasing practices.

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Hidden in the green mussels were tiny crabs.

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Stone crab giving me the evil eye.

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Onchs seem to be tough slugs that inhabit virtually any shore rocky areas.

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The sand under the boulders seem to be thick with black stuff as well as white filamentous possibly some sort of bacteria?

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Some of the boulders were also encrusted with something looking like tiny versions of Pavona coral.

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A large stone crab that had nested itself under a boulder.

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Tiny porcelain crabs could be found under the rocks too. This one seemed unfortunate enough to lose both its claws. Sometimes I worry if it was the act of turning over the rock that caused it.

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Many of these black sea urchins could be found among the rocks.

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Drill snails (Muricidae) too. These snails seem to be laying eggs together.

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Spiral melongena (Pugilina cochlidium) eggs.

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Climber crabs could be found scurrying up and down the pillars of the jetty. Occasionally one would plunge into the waves, possibly in panic at the human presence.

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The pillars were also home to many tiny yet colorful anemones (Diadumene sp.?). They look like tiny gems and come in a variety of colors.

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On the opposite side of the jetty was a rubbly shore inhabited by carpets of tiny organisms like these anemones (Anthopleura sp?).

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These pale gentle hydroids were also home to many really tiny crustaceans, snails and other creatures.

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A closer look at some of the organisms living on the hydroids. Around the snail seemed to be a couple of shrimp-like creatures. The tiny world seems to be a fascinating place indeed.

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Hoof shield limpets (Scutus sp.) were occasionally found under the rocks here.

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Sea spiders (Pantopoda). They seem to be quite common on this shore. They are tiny creatures with a splayed leg span of less than 1 cm. They are not true spiders, belonging in a different class of organisms (Pycnogonida). Oceanwideimages has some pretty amazing photos of sea spiders.

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A closer look at a sea spider.

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Kok Sheng found this rock star, a pair of nudibranchs (Dendrodoris fumata) and shrimp under some of the rocks.

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The shrimps seem to come in purple as well.

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Under the rocks were also strange egg-like gelatinous layers which are possibly ascidians.

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Kok Sheng pointed out this beautiful growth which I regrettably forgot the name of Bryozoans.

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Ascidians carpet this shore.

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Closer look at one of the ascidian lumps.

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Toadfish.

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Kok Sheng also found small patches of Halophila seagrass. Not sure if they are H. ovalis or H. decipiens.

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This is one shore crawling with completely unshy brittlestars.

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Not sure what that white stuff next to the disc is.

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Henrietta pointed out to us the sunset which I would have missed had she not done so.

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