Spiders In Tank?

[Leprichon]

I have a lot of spider looking things in my tank...I believe they start off rather small with just a single black tentacle protruding from a rock...they can get about an inch an a half long...after that I think they grow 3 additional tentacles...then the can move out of the way themselvs when you go to catch them...oh, and they SPREAD...theyr a bit like aptasia, but the stuff that kills them doesnt seem to have an affect on this thing...Id love to know what it is, but more than that Id really like to know how to kill it...It doesnt look very appealing, and Im not sure its good for my other corals or seahorses etc...

 

[kaivalagi]

Should be posted in the salty section

 

[Harry1996]

can we have a picture? sounds like serpent stars?

 

[seffieuk]

can we have a picture? sounds like serpent stars?

Seconded or jelly fish, hydromedusa (sp), both are fine in the tank and are self limiting

Seffie x