Thin yellow starfish and 2 headed worm!?

[andreas265]

Hi all,

On a piece of my live rock I have what looks like a thin yellow starfish coming out of a hole or it could be a whole bunch of worms coming out the same hole. The tentacles are about 4-5mm long. I have also spotted something similar coming out of another hole. Can someone please help me ID them.

I also have what looks like a two headed worm that is a cloudy white colour. When it comes out at night from its hole the two bodies are about 1.5cm long and maybe 3-4mm thick but I've noticed once that one of the heads stretch to about 5-6cm and became quite thin until I shone a light on it and it retracted back to a shorter stump. Anyone have any ideas?

(The first 7 pics are of the yellow starfish/worms and the last 3 pics are the two headed worm)

Thank you so much in advance.

Kind regards,
Andy

 

[WheatToast]

1. Spaghetti/hair worm. These are harmless detritivores with multiple tentacles.

Not so sure about 2. but they may be peanut worms, also harmless detritivores.

 

[andreas265]

1. Spaghetti/hair worm. These are harmless detritivores with multiple tentacles.
View attachment 2825878

Not so sure about 2. but they may be peanut worms, also harmless detritivores.
View attachment 2825882
View attachment 2825881

Thank you so much. It is really kind of you to take time and help me.