What is this?

[Aucklandreefer]

Found growing on a couple of my snails, at first i only saw the hexagon shapes but when i looked closer i saw whats in the pictures
Any ideas?

 

[Redfoxtang]

Looks like nerite snail eggs to me.

 

[vetteguy53081]

Egg city

 

[Aucklandreefer]

with the feather like growths?

 

[C. Eymann]

Bryozoan

maybe membranipora membranacea

 

[Aucklandreefer]

Look around the silhouette of the snail

 

[Aucklandreefer]

Bryozoan

maybe membranipora membranacea

Thank you!

 

[Aucklandreefer]

Are they friend or foe?

 

[C. Eymann]

Thank you!

No worries, happy reefing !

 

[C. Eymann]

Are they friend or foe?

It can be invasive in certain situations, if it starts covering coral, id remove it, I dont believe they post a big threat in reef aquariums though.

 

[C. Eymann]

http://reefkeeping.com/issues/2003-10/rs/index.php