Pei Yan spotted this fiddler crab wandering slowly on the seawall!
Here's what the fiddler crab looks like from the front. It is quite large and it doesn't look like the fiddler crabs we often see on our shores. I'm not sure what kind of fiddler crab it is and what it's doing on the seawall! These crabs are usually found on flat bottoms. Pei Yan looked and couldn't find another one. [Update: Thanks to Ivan Kwan who pointed out that this might be Uca tetragonon which Kok Sheng first found at Sultan Shoal lighthouse. Later, Dr Tan Swee Hee conveyed that Prof Peter Ng believes this is a large Uca dussumeri. We will know for sure when Prof Peter has a chance to take a closer look at it.]
Saron shrimps (Family Hippolytidae) lurking in crevices among the rocks. They are quite well camouflaged!
Spotted orange hermit crab (Dardanus megistos).
Banded hermit crabs we see on our shores are alike. This one has dark bands on its body with a pair of bright pink spots. And its short tentacles and eyestalks are not colourful.
Swimming crabs (Family Portunidae) of various kinds. Most were small (body under 10cm wide).
Pore corals (Porites sp.) and Favid corals (Family Faviidae), and I saw one small colony of Anemone coral (Goniopora sp.).
Button zoanthids or colonial anemones (Zoanthus sp.) and two Frilly sea anemone (Phymanthus sp.).
damselfishes (Family Pomacentridae), cardinalfishes (Family Apogonidae) and one grouper: the Chocolate hind (Cephalopholis boenak).
gobies (Family Gobiidae) of all kinds all over the place. They are often very well camouflaged.
Giant top shell snail (Trochus niloticus). It is distinguished by the wavy outline of the base of the shell.
Spotted top shell snail (Trochus maculatus) has a smooth circular base. The animal is rather colourful and 'fluffy' with tentacles of various sizes and arrangements.
Smooth ribbon seagrasses (Cymodocea rotundata) continue to expand! We think this one must be about 20m wide. In Singapore, this species of seagrass is only abundant at Chek Jawa and Cyrene Reef.
Spoon seagrass (Halophila ovalis) growing among the Ribbon seagrasses! The Spoon seagrasses have large leaf blades. There are still lots of small Haddon's carpet anemones (Stichodactyla haddoni), but I didn't see any anemone shrimps. Sadly I noticed several large holes in the middle of the seagrass meadow. Did someone dig up the carpet anemones? I hope not.
Bazillion snails (Batillaria zonalis). Did they graze off the epiphytes?
Garlic bread sea cucumbers (Holothuria scabra) near the seagrasses.
yesterday on Tape seagrass.
Tape seagrass (Enhalus acoroides) further along in the lagoon is still doing fine and has lots of female flowers. I've seen this clump bloom many time since the oil spill.
Sickle seagrass (Thalassia hemprichii) is still there although the leaf blades look a little short and cover is rather sparse. It was dark and windy (which ruffles the water surface) so I couldn't get a good photo of the patch.
International Coastal Cleanup Singapore did a clean up of this shore recently. The big pile of black bags are probably the result of their hard work. Alas, new trash just keeps washing up on our shores.
massive oil spill that landed on this shore in 2010 and was not cleaned up. Streams show and poop of burrowing Acorn worms (Class Enteropneusta) show the crude that is still buried beneath the sand.
June 2013 when we also saw otters here. We also visited in June 2012. It was Kok Sheng the Human Climbing Crab who first told us about it. And he surveys it regularly, sharing awesome photos of this reef on his blog: 2011 and 2010 and 2009.
beautiful and interesting marine life can settle naturally on seawalls and artificial structures!
More about the oil spill on this blog and on the Oil spill facebook page.
More beautiful photos of amazing critters in Marine animals crowd at Tanah Merah on a beautiful sunset by Pei Yan.