Cannot figure out what these stringy worm things are.

[thegriffer]

I have no idea what these thin worms are they seem to be very long and when I touch them with something they very quickly recede into the rock work. I have seen them for quite a while maybe just one or two. Now they are spreading everywhere and the numbers are increasing.

Thanks.

 

[kenny80]

Could be brittle stars.

 

[thegriffer]

Could be brittle stars.

I sort of thought that as well but they are so long.

 

[Tahoe61]

I am thinking it's a spaghetti worm gathering food.