Growing things on my corals ?

[katgagnon]

Ok i got two questions: Anyone knows what is those orange spot on my Duncan? It’s only on few places
And my second question is what is that yellow spongy thing with a tube growing on my frogspawn?

Thanks very much so

 

[Ly78]

Can tell but on the duncans if its moving kinda look like flatworms to me.

 

[ISpeakForTheSeas]

I'm not sure on the orange spot either, but the yellow spongy thing is just that - a sponge.

As long as it doesn't start to grow over and smother the polyps, it should be harmless/beneficial (it can grow on the skeleton like that without causing issues). Generally speaking, sponges that aren't visibly disturbing nearby corals (your sponge doesn't seem to bothering the coral) are only a problem if they starts growing over the coral's actual flesh.

 

[katgagnon]

Can tell but on the duncans if its moving kinda look like flatworms to me.

Yes i think you are right about the flat worms
Thanks