Flatworms on glass?

[KatesReef13]

Hi All,

I was checking on my coral QT tank and noticed small, white, what appear to be maybe some type of flatworm, but I'm not sure, crawling on the glass. They look to be chasing/eating the copepods.

I took a couple of pictures and a quick video of its movement. Anybody have any idea what they are?

Just want to make sure they aren't bad.

Thanks in advance!

 

[lapin]

possible acoel flat worm

 

[vetteguy53081]

Acoel flatworms. Although not harmful can be a nuisance as they grow in numbers. Siphon up as many as you can.
Lunare or melanrus wrasse, target mandarin goby and evem blue velver nudibranch will eat them.
Secondary measure is flatworm exit

 

[KatesReef13]

Okay thanks all! Right now since they're just in the coral QT, should I be aggressive about removing them? I'm doing a fishless QT so I don't want to put any fish in, but I'll look into getting a nudibranch.

Thanks again!

Edit: Just looked up the nudibranch, I'm not close to an expert so I don't want to attempt that guy lol

 

[KyleC]

Have these too! Good to know they're not necessarily bad. Want to avoid using fluke-solve as I have a lot of tiny feather dusters I'd hate to lose.