This morning I took a really REALLY close look at the seagrasses at Changi. I was literally crawling along the entire beach.
Striped hermit crab (Clibanarius infraspinatus) on the shore, many had lots of little Drill snails stuck on their shells.
Here's a young Fan clam (Family Pinnidae), the shell is translucent against the morning sun.
White sea urchins (Salmacis sp.) dotting the seagrass meadows. As usual, they were carrying things including seaweeds, seagrass leaves and other bits and pieces.
Sea pencils sticking out above the sand. Each stick is a colony of animals and usually only commonly seen at night, retracting into the sand during the day.
Bazillion snails (Batillaria zonalis) on a small patch of seaweed.
Sand collar, with my foot for scale! These stiff plasticky feeling flat coils are the egg mass created by a Mama moon snail (Family Naticidae). She produces mucus which combines with sand and hardens into this shape. Once the eggs hatch, the collar disintegrates. So an intact collar is full of baby snails!
Naked moon snail (Sinum sp.)! My first time seeing one with a brown shell and the first time I've seen one at Changi. [Correction! Tan Siong Kiat took one look at it and said it isn't a Sinum sp. It is either Polinices melanostomoides or Polinices melanostomus. Although it does have a huge body, unlike Sinum sp., this has an operculum]
Olive snails (Family Olividae) which started to emerge in numbers from the sand as the tide turned. Today, I also saw many large dead Hammer oysters (Malleus sp.) but only a few Window pane clams (Placuna sp.).
Pink warty sea cucumber (Cercodemas anceps) and Thorny sea cucumber (Colochirus quadrangularis), Cake sand dollars (Arachnoides placenta), Plain sand stars (Astropecten sp.). I also saw a broken shell that might be of the intriguing Watering-pot shell (Verpa penis), which so far, I've only seen on this shore.
bryozoans growing on seagrass blades for the upcoming Bryozoan and Hydroid Workshop. Alas, after peering at what felt like nearly every blade, I only found one tiny suspicious patch on a Fern seagrasses (Halophila spinulosa).
Spoon seagrasses (Halophila ovalis).
carpet anemone (Stichodactyla haddoni)!
Needle seagrass (Halodule sp.), which is now quite dominant on the high shore.
sand bubbler crabs (Scopimera sp.) were also very busy processing sand and leaving delicate patterns of sand balls on the high shore.
Dec 2012. Changi is one of my favourite shores, rich in all kinds of a marine life.