Strange sea cucumber worm creatures

[Dustinmicks]

Anyone know what these are? They developed a few months ago and have been slowly spreading. They're like stationary worm like things with little feathers or something on the ends, maybe some type of filter feeder?

 

[EeyoreIsMySpiritAnimal]

Pineapple sponges

 

[Reefkeepers Archive]

Pineapple sponge - harmless/beneficial filter-feeders

 

[Dustinmicks]

Pineapple sponges

Awesome, I'll probably let them be for a bit but start removing them if they thrive too much