What are these string like spore things...

[alexytman]

these white string thingies can elongate and contract... Is it a sponge? I have like three different species at least if sponges growing in random location. Does this mean my water quality is dropping

 

[mta_morrow]

I believe it’s sponge and a sign of good water quality. Not bad!

 

[Lovemyreef2015]

They look like digitate hydroids.

 

[Lovemyreef2015]

You are talking about these correct?

 

[mta_morrow]

They look like digitate hydroids.

Hmmmmm. Researching now!

 

[KJ]

Candelabrum sp. Digitate hydroids.
MORE IMAGES!

 

[alexytman]

Candelabrum sp. Digitate hydroids.
MORE IMAGES!

Well. The word hydroids scare me... How to remove?

 

[mta_morrow]

Candelabrum sp. Digitate hydroids.
MORE IMAGES!

Thanks @KJ

 

[KJ]

Thanks @KJ

 

[DSC reef]

+1 for hydroids. Good eye @Lovemyreef2015

 

[alexytman]

I have washed the sponge with freshwater.