Can anyone ID these?

[Siriusrottweilers]

I purchased a RBTA on this rock and after the anemone moved to another part of the tank these began to grow. The feeder tubes seem to come and go throughout the day. They are very yellow and some have multiple feeder tubes and others have just a few. I'd appreciate any feed back about what these might be!

 

[Waddi]

First and only guess would be some kind of funky looking Sponge or Tunicate.

 

[Smitty]

They look like baby long polyp leather corals.