We suddenly saw many of these strange snails at Changi recently. Thanks to Tan Siong Kiat and Neo Mei Lin, I learnt that these are Mitre snails (Family Mitridae).
wild fact sheets.
Siong Kiat patiently showed me the difference between these two kinds of file clams we saw recently. The active one with long red tentacles is Limaria sp., its shell is thin and can't close completely. There's a big gap on one side.
Lima vulgaris. Its shell is thicker and can close completely. It's also not as active as Limaria sp.
Triton snail (Family Ranellidae).
Volachlamys singaporina or the Singapore scallop as it's named after Singapore!
Obelisk creeper snail (Rhinoclavis sinensis).
Nest mussel, but now I think they are Xenostrobus mussels.
Dr Dale R. Calder of the Department of Natural History Royal Ontario Museum kindly wrote to me to tell me this fluffy branching creature is NOT a hydroid. He says it's a kind of bryozoan! Wow!
ctenaphores. Thanks to Nicholas Yap for finding out and sharing more about them. Those seen so far were on large Omelette leathery soft corals (Sacrophyton sp.), often with many of them on one soft coral. The tiny animal produces two fringe tentacles than can be many times longer than the animal. It is used to gather food. The tentacles are stored in two large swellings on the animal.
corallimorphs rather than sea anemones. Hopefully, when we next see Dr Daphne we can sort this out.
bubble-like ascidians more frequently, so I've done a little fact sheet, although I have no idea what they are exactly.
See the wild fact sheets.