some strange growth in H. rubra aquarium

[stonefox]

Hello

In my aquarium with H. rubra, is starting to get some strange growth that I have not seen before in some of my other aquariums with H. rubra.

See the picture.

Picture 1 and 2 shows how it looks in the beginning and images 3 and 4 and 5 show what it becomes.
They are completely white, approximately 5 cm wide max, and feels like a thread when I notice them. What is this? and is it harmful?

[Stalker]

Very interesting, have you some snails in the tank? That looks like some nerite eggs.

[stonefox]

Yes I have snails, but snails Eggs don't grow and look like plans with long filamentous

[Stalker]

Does the filaments retract when you touch them? Are the shrimps malking on them without been harm?

There is only a few plants or animals compatible with Opae Ula, it would be great to discover some fort of soft coral compatible with this brackish environement.

[Stalker]

Nothing new?