Some scientific names needed (Singapore)

This is for a research project so some of the photos aren't too pretty, but ID will be greatly appreciated at least to genus level.

Once again, photos not very pretty and I apologize!

The first is a featherduster worm, Sabellastarte sp.

The second is an oyster.

The third is a Paramonacanthus filefish. I think that it is Shortsnout Filefish, Paramonacanthus curtorhynchos, though I am not certain.

Next is some sort of cnidarian, but I can’t tell from the photo.

Then the feeding tentacles of a sea cucumber, possibly a Neothyonidium species.

And finally, a coral or anemone, not one I recognize.

-Mark