There was a collision on 29 Jan evening between a chemical tanker and a containership which happened "about 2.7 km, south of Jurong Island". This has caused a spillage of bunker fuel in the surrounding waters. On a Lunar New Year holiday, we decided to swing by the Semakau and Terumbu Raya area to have a look at the impact of this oil spill.
Furry sea hare (Stylocheilus sp.) and touched it like what I did at Kusu yesterday. I was relieved to not feel any oil on its surface.
Fluted giant clam (Tridacna squamosa)! It was sitting on top of a boulder hard coral.
Magnificent sea anemones (Heteractis magnifica)!
Long spined black sea urchin (Diadema sp.), a huge Barrel sponge (Xestospongia testudinaria), and also the Magnificent sea anemone on the right.
Physogyra Coral (Physogyra sp.)!
Correction: Thanks to Jeff Low for the correction, this coral is actually Plerogyra sp. instead of Physogyra sp. These two coral genus look similar but Physogyra is a solid, boulder form, compared to the wavey meandroid form of Plerogyra sp. (which is shown in the photo).
Plerogyra corals have bubble-like vesicles and trumpet-like corallites with separate walls. I'm quite excited as this is my first time seeing this coral on our intertidal shores.
Galaxy corals (Galaxea sp.). It's amazing how these snails can feed on the retracted tentacles of the coral.
Reef octopus is a king of camouflage! They can and will change colour and shape to blend into the environment.
Bulb-tentacled anemone (Entacmea quadricolor).
Pizza anemone (Cryptodendrum adhaesivum) was found wedged amongst the rocks at the reef edge.
Tomato anemonefish (Amphiprion frenatus) were stranded or trapped in the tide pool.
Giant carpet anemone (Stichodactyla gigantea) are some other stranded
False clown anemonefish (Amphiprion ocellaris).
This bluish anemone which can sting badly when touched is actually known as the Fire anemone (Actinodendron sp.). The oral disk has white stripes with small dark spots, radiating from the mouth.
Stonefish sea cucumber (Actinopyga lecanora) is quite commonly seen on the reefs of Semakau. Thankfully we did not see (or step on) the real stonefish today.