ID Critters in Overflow?

[Coral Hygiene]

Put a flashlight in my overflow drain area and found it infested with all of these critters. They have a root-like base, cylindrical body, and a fan shaped mouth.

 

[DSC reef]

They look like sponges and little feather dusters. Good critters

 

[Coral Hygiene]

They look like sponges and little feather dusters. Good critters

Alright, didn’t think of sponges. Are feather dusters clear when they are small?

 

[DSC reef]

Sponges can be. It's a good sign though