The rocky shores at Punggol Jetty were dotted with small Crown sea star (Asterina coronata). Most of them are drab and blend with the rocks, but a few might be bright orange!
The rocky shore west of the Jetty seemed a little bare compared to my last trip here in Jan 2013. There were only sparse growths of two main kinds of sponges: Blue elegant branching sponges (Haliclona sp.) and Purple branching sponges (Callyspongia sp.). There were only one or two patches of other kinds of sponges and few of the blob ascidians that were so common on my last trip. There were also few Green mussels (Perna viridis). This shore is very methodically and frequently harversted.
Burgundy anemones (Bunodosoma goanese) all over the rocky shore. So far, we haven't seen these sea anemones on other shores in such numbers. As well as lots of tiny sea anemones coating the rocks in countless numbers including Lined bead anemones (Diadumene lineata) and Anthopleura dixoniana. I saw one and one Mini carpet anemone (Stichodactyla tapetum) and a Petal-mouthed mangrove anemone. There was also a Slender sea pen (Virgularia sp.). But I didn't come across the large Haddon's carpet anemones (Stichodactyla haddoni) I saw on past trips. Rene saw more as she checked out the deeper water and saw sea fans and cerianthids too.
Flower crabs (Portunus pelagicus). The male flower crab holds onto a female that is about to moult so he is the first one to mate with her when the time come. Crabs can only mate when the female moults.
Powder blue-clawed swimming crab (Thalamita crenata). There were also many Stone crabs (Myomenippe hardwicki) and lots of Purple climber crabs (Metopograpsus sp.).
Black sea urchins (Temnopleurus sp.), often in clusters and 'carrying' bits of debris.
Ovum cowries (Cypraea ovum) and many small brittle stars.
Worm snails (Family Vermitidae). These snail produce long coiling shells stuck onto the rock. But like most other snails, they have an operculum (yellow arrow) and a pair of tentacles (blue arrows).
Hoplodoris nodulosa and Dendrodoris fumata.
Hairy spoon seagrasses (Halophila decipiens)! There were also large patches of Caulerpa seaweeds but we couldn't find any slugs in them.
Shannon Lim on facebook: The drum "probably [came] from one of the coastal farms. These barrels cost about $60 used & unwashed and are tied to beams as floatation. Every now and again they break off and drift away. By the way, unwashed barrels usually contain a few hundred ml of residual chemicals that farms either leave inside or just dump overboard."
one producer of the chemical is used to prepare detergents, pesticides for spraying, paint sprays (distempers and anionic specialty formulations), preparing fabric for dyeing. Here's a Material Safety Data Sheet for this chemical (pdf) which suggests it can be harmful to people and wildlife.
Shannon Lim on facebook: "Looks like a disposable waste chute that we use in construction."
More photos of this trip by Rene Ong on facebook.