ID Not sure if it is a soft coral

[beastie]

Found this in my tank while feeding tonight. Anyone know what it is?

 

[miranda60]

i think its a sea pen

 

[Khemul]

Do you have a large Whelk or Conch in the tank?

 

[MARINECRITTERS]

Does not look like a sea pen, the individual sections are like plates on that one.
Looks like some species of macro algae.

 

[Beandawg]

Looks like an egg case/string to me.

 

[Monkeyfish]

hydroid

 

[wii64brawl]

Hard? Soft? Flexible? Stiff?

 

[nommarune]

I have nooooo idea.... I would watch it carefully though for any change.

 

[ExploitedSanity]

That would look cool if it was colored. How tall is it? Need a size reference.

 

[ExploitedSanity]

There are similar pics to the "plates" but not attached by a single stalk like in the OP.

http://www.wetwebmedia.com/SnailEggIDF2.htm