Need help ID.

[mowgli.reef]

So I was just checking my tank while the lights are off and found these critters. Need help IDing.

They look like flatworms but fast and hides when light is on them.

 

[nautical_nathaniel]

They look like flatworms to me too. See if you can get a good still image of them for a more positive ID.

 

[mowgli.reef]

Found one in the glass.

 

[Gumbies R Us]

@ISpeakForTheSeas

 

[EnterName]

Most likely a Ghost Flatworm.
They are harmless, but annoying. If you start to see the first ones now, it doesn't take too long until they are everywhere.

 

[ISpeakForTheSeas]

@ISpeakForTheSeas

I'm late, but +1 for ghost flatworm:

Yeah, Ghost Flatworm (presumed to be an Amphiscolops species at the moment) - they're pretty neutral, but it's generally recommend to remove them to be safe.

 

[EnterName]

@ISpeakForTheSeas

I'm late, but +1 for ghost flatworm:

Yeah, Ghost Flatworm (presumed to be an Amphiscolops species at the moment) - they're pretty neutral, but it's generally recommend to remove them to be safe.

Do ghost flatworms and the harmless type of Aocel flatworms (see attached image below) produce toxins when treated with products like flatworm eXit? If you need a closer look you can check out post #85 in my microscopy thread.

Or is this phenomenon limited to a few harmful species like Convolutriloba retrogemma?

(probably Heterochaerus sp.?)​