What are these spots on my frogspawn?

[rapurcell85]

Does anyone know if I need to be worried about these red spots on my frogspawn? They don't appear to move, wondering if its just coraline, or do 8 need to be worried?

 

[JGT]

Formanifera, harmless.

 

[Daenion]

Do they move? Look a bit like flatworms

 

[rapurcell85]

Do they move? Look a bit like flatworms

I haven't seen them move.

 

[i cant think]

Does anyone know if I need to be worried about these red spots on my frogspawn? They don't appear to move, wondering if its just coraline, or do 8 need to be worried?

They look like a species of red sponge, I have two similar looking sponges that are more yellow and cream but they appear in small pieces all under the rock and in shaded areas - I have two mother sponges in the sump which came from the babies.

 

[Townes_Van_Camp]

I have a torch with a good sized colony that comes and goes. It dies on any piece I frag off and move across the tank.