What are these red spots?

[C loss]

Wondering if these things are bad and need to get rid of them.

 

[Reeferdood]

Likely a small sponge

 

[C loss]

Likely a small sponge

Another quick question, is it bad? Sorry just really new to the hobby.

 

[GThompson]

If it’s sponge it should be okay. More than likely it will die off on its own

 

[Reeferdood]

No, harmless filter feeders.
Welcome to the hobby!

 

[C loss]

Thanks for the help!