Something from Lembeh

I saw this in the sand in Lembeh - about 4-5 inches tall, with numerous glass shrimp on it, and some small white egg-like objects (top right). I have no idea what it is - some type of worm?

I've attached front and back views. Or opposite side views, I guess - I have no idea which is the front.

Tim

Looks like a Sea Pen to me.

Alex

Looks like a Sea Pen to me.

 

Alex

Thanks. Any idea what the round white objects are in the upper right corner? Some sort of egg mass was my guess.

The white masses are anemones. Graham Abbott previously posted a pic of the same thing which I sent off for an id but never got a reply. Those long armed shrimp appear to be a species of Kemponia.

DOH! Just whip me with a fireworm & teach me not to flip the pages so fast..... p. 93 in "Coral reef animals of the Indo-Pacific" by Gosliner, Behrens, & Williams. The white anemones are attached jellyfish that might be in the genus Lipkea. Unlike other jellyfish these don't swim; they live attached to bottom dwelling organisms. The picture shows several on a sea pen