ID hard encrustment Frogspawn

[liddojunior]

I bought some corals that I’m pretty sure are maricultured. And this frogspawn as these unusual encrust meant that I wonder if it’s flatworm eggs.

 

[ISpeakForTheSeas]

I bought some corals that I’m pretty sure are maricultured. And this frogspawn as these unusual encrust meant that I wonder if it’s flatworm eggs.

That's a bryozoan - a harmless filter-feeder. I haven't heard of them growing over corals, so I wouldn't be concerned - if you want to try and help it live/grow, then dosing phytoplankton (preferably a blend) would be useful.