What kind of flatworm are these?

[JMLewis]

Basically need to see if I should be worried or not. I've only seen them in my sump my leopard wrasses search every nook and cranny of the display so haven't seen them in there.

They're very small maybe the size of the flat end of a pin (sharp pin not writing pen) or smaller.

 

[Triggreef]

Those don't look bad. Do their mouth sort of balloon up as they crawl around? If so nothing to worry about.

 

[apcoleman]

Appears to be planaria flatworms

 

[JMLewis]

Those don't look bad. Do their mouth sort of balloon up as they crawl around? If so nothing to worry about.

Can't really tell they're very small.

Appears to be planaria flatworms

Just Googled planaria flatworm and those look alot longer and skinnier than these. These have a distinctive v shape to their rear end.

 

[JMLewis]

I take that back, looks like your right Planaria flat worms. Looks like won't be an issue, hopefully my 2 leopard wrasses will keep em in check.

 

[Triggreef]

My leopards and pretty much no other wrasses I've had will touch red planaria. Those do not look like red planaria in your pic though.

Yours imo look more like these, correct me if I'm wrong.

 

[hybridazn]

Def a planaria. I had a melunarus wrasse that went nuts for them