White sponge-like growth

[LiveRock]

Hello there

recently, I notice some white finger-shaped, sponge-like growth appearing from my liverocks. They are not moving and they look like individual toothb brush bristles. I wonder what are they and if they are harmful or harmless.

Any info helps... Thanks!

[LiveRock]

Hello there

recently, I notice some white finger-shaped, sponge-like growth appearing from my liverocks. They are not moving and they look like individual toothb brush bristles. I wonder what are they and if they are harmful or harmless.

Any info helps... Thanks!

[LiveRock]

Hello there

recently, I notice some white finger-shaped, sponge-like growth appearing from my liverocks. They are not moving and they look like individual toothb brush bristles. I wonder what are they and if they are harmful or harmless.

Any info helps... Thanks!

[LiveRock]

Hello there

recently, I notice some white finger-shaped, sponge-like growth appearing from my liverocks. They are not moving and they look like individual toothb brush bristles. I wonder what are they and if they are harmful or harmless.

Any info helps... Thanks!