ID help - friend or foe

[Jbern]

Hi,
I hope the picture is good enough. There is some yellow stuff growing on my rock. I have read mixed views on it. Some people saying it is a sponge beneficial as a filter feeder, other mentioning risk of toxins. Any idea if this is even a sponge to start with? And whatever it is, is it a friend or foe?
Many thanks in advance.

 

[Reef Jedi]

I think a clearer picture under white light would be helpful to better ID

 

[Reef Jedi]

I think a clearer picture under white light would be helpful to better ID

 

[BryanM]

Clearer pic for sure please.

Is that real live rock? If so, best bet is to ask the supplier -- they know their rock very well.

 

[Jbern]

Sorry, the angle makes it hard to get better pictures. But there are two shades of yellow I am not sure what they are. It is live rock, but I bought it long agk and has matured further in my tank.

 

[BonnieB]

Sorry, the angle makes it hard to get better pictures. But there are two shades of yellow I am not sure what they are. It is live rock, but I bought it long agk and has matured further in my tank.

I think you are talking about what looks like the majano anemones and they are pests and should be taken out by one of several methods (your choice). Natural or chemical. Simple or complex. There are many different ways that work for people here. Here’s a post that should be helpful: https://www.reef2reef.com/threads/majano-anemones.319832/

 

[tzabor10]

The yellow looks like a sponge to me.

 

[BonnieB]

The yellow looks like a sponge to me.

Ooops yes, yellow looks like sponge…. Guess the other caught my eye first