There are lots of nudibranchs even on Changi! Today, I came across a whole bunch of them, crammed together busy laying egg ribbons.
I started the trip at a stretch of rocky shore that I last visited in Aug 2011. There were lots of these colourful spotty nudibranchs everywhere. They are a yet to be identified Hypselodoris that we often see on our Northern shores.
Orange sea cucumber has a coil of what seems to be a nudibranch egg ribbon laid on it. Nudis usually lay their eggs on or near their food source. Oh dear, I don't think nudis eat sea cucumbers. But who knows!
sponges grow on all hard surfaces here including artificial structures. Today I saw lots of little Blue spotted flatworm (cf Pseudoceros indicus) everywhere.
sea fans (Order Gorgonacea) have settled on the rocks. Elsewhere, I see fishing line entangled in dead or dying sea fans, or simply no sea fans at all.
Gnarled sea fans, and Candelabra sea fans. Each is a colony of tiny polyps emerging from a central 'branch'.
Skinny sea fans, which can grow very large on this shore.
Red ovulid snails. The snail covers its shell with its body mantle which has bumps that resemble the while polyps of the sea fan! These snails may eat the sea fan.
Colourful tiny brittle stars (Ophiothela danae) that wrap themselves around sea fans.
Pink flowery soft coral and one tiny Ball flowery soft coral. I couldn't find any animals living in them.
Stinging hydroids. They pack a powerful sting that can 'burn' skin and take a long time to heal.
Zebra corals (Oulastrea crispata). Finally, I managed to get a photo of the coral polyps that are green and bluish. I often wondered if the green and blue ones were the same. It seems the polyp has a green central disk?
feather stars (Order Crinodea), here's one nicely relaxing in a pool of water.
Baler snail (Melo melo)! My first encounter on this shore. It wasn't very large, I hope it grow up safely as these snails tend to be collected, apparently to be eaten.
Ovum cowerie (Cypraea ovum) protecting her egg mass with her large foot. There were lots of other creatures under the stones and rocks too. I also saw many Crown sea stars (Asterina coronata) here.
Striped hermit crabs (Clibanarius infraspinatus) today. Not sure why.
Punggol yesterday, large areas of the rocks and the shore was covered in a soft layer of nest mussels (Musculista senhousia) that create a carpet of tangled byssus threads to live in. Today I saw few zoanthids (Order Zoanthidea), probably they were smothered by the nest mussels. I was very surprised to see seagrasses growing on this carpet. The seagrasses were well rooted into the felt-like layer of 'nesting material' created by the mussels.
Hairy spoon seagrass (Halophila decipiens)? Mei Lin also spotted similar looking seagrasses yesterday at Punggol.
Nov 2011. This shore had some Cake sand dollars (Arachnoides placenta), lots of sea pencils, and I spotted one Peachia anemone (Peachia sp.).
Very long sea anemone! My first sighting of it in the North!
hermit crabs huddled on the sand bar. I find such gatherings an easy and quick way to find out what snails are common in the area!
Spoon seagrass (Halophila ovalis) with large leaf blades and Fern seagrass (Halophila spinulosa).
Mei Lin, Pei Yan and Marcus.
But the most amazing find to me was this weird creature that I've never seen before.
Tomorrow, another adventure on another super low spring tide. Alas, also well before dawn.