What are these

[Redandluvenit]

Any idea what these are? They are growing on my scrapper

 

[moz71]

Pineapple sponge Harmless

 

[Bear Claw]

Cant really tell from the photo. Maybe abtashias??

 

[Eagle_Steve]

Pineapple sponge Harmless

Agree. Little pineapple sponge.

As said before, harmless and typical in new tanks. Some may still be present as tanks age, but not usually as many as when it is newer.

 

[ying yang]

+1 pineapple sponges

What is that!! A R2R guide to common new tank hitchhikers.

One of the greatest things about starting a reef tank is getting your live rock in and admiring all the diversity within it. The rock comes to life different creatures. This is a guide that I, along with a very well known critter identifier @KJ , have put together for the new reefer on what...

www.reef2reef.com

.some common hitch hikers here for you

 

[Redandluvenit]

Agree. Little pineapple sponge.

As said before, harmless and typical in new tanks. Some may still be present as tanks age, but not usually as many as when it is newer.

My tank is over a year old... Got a new light and now have green hair algae and then these showed up

 

[Eagle_Steve]

My tank is over a year old... Got a new light and now have green hair algae and then these showed up

Could just be a bloom then, as the gha or something else may be feeding the pineapple sponges. They usually come and go with silicate being high or low. Why I mention them being common in new tanks.

I have some in my sump on my 6 year old tank, but I dose silicate for other sponges I have.