Might have an interesting one - what is this

[Distilled]

 

[StatelineReefer]

The white 'straw'?

Sponge. Recently had some hitchhike in on a coral frag. Hardy, for a sponge. Looks amazing under a microscope. Silica lattice

 

[ISpeakForTheSeas]

Agreed - sponge. Harmless filter feeder.

 

[Distilled]

Great! Thanks for the ID!

I see it wrapping around the zoa its not going to strangle them or anything bad right?

 

[ISpeakForTheSeas]

Great! Thanks for the ID!

I see it wrapping around the zoa its not going to strangle them or anything bad right?

Sponges can smother corals by growing over them, but as long as it's just growing around the base it's fine. If you're concerned about it, you can cut/scrape that part of the sponge off and suction it out though.

Edit: just to add, sponge very rarely grow over corals - only a select few, rare, species actively grow over them.

 

[StoneNeo82]

Detritus worms are what they look like from the picture.

 

[StatelineReefer]

My specimen of this sponge has grown to about the size of a golf ball. It will grow near, but not up to, corals, and seems to have a strong antialgal allelopathy, The area around the sponge being clear of ulva and hair algae, the two most prevalent in my tank