Friend or foe, in sump, clear, moving slowly, youtube video linked

[danielankeny]

May 28, 2023

youtube.com

Good guy or bad guy, friends?

 

[Goaway]

Maybe a ghost flatworm or acoel. Remove any you find. Can become a nuisance in large quanties and smother corals.

 

[exnisstech]

Looks like a ghost flat worm.
When I asked about them (had one in my sump) I was told they are mostly harmless but will eat pods.