Trying to figure out the name of these creatures.
They have long legs that seem to stretch for 3 inches and retract into the sand. They build rock towers with large pieces of sand. Their arms have red strips around them. The look like tiny star fish arms that are bungees.
Here is a picture. You can see one short arm sticking up and if you look close in the sand you can see one arm reaching way out.

Hope someone can give me some info.

Thanks

looks like 2 different creatures to me. the long stretchy arm looks like a spaghetti worm and the other looks like a babylonia snail snorkel. just my opinion tho...

Definitely the same the creature. I have a snorkel snail and know what his snorkel looks like. This one has more than one arm and the more they stretch them the thinner the arms get and the red lines look different.

They use some type of 'glue' to attach sand together. I use to have a shaving brush plant and they would attach sand particles to the shaving brush branches until it became a rock tree instead.

Anyone else with ideas here?
Here are 2 more pics. One of the arms and one of the tower of rocks they built.

Terebellid worm. (spaghetti or sand mason worm)

+1

http://www.thereeftank.com/gallery/showima...catid=newimages

fugly fella, but great for the tank.

Thanks guys.

I have never seen his body. It's definitely strange looking.
Why are these good for the tank?

Detritus and water column feeders.