Are These Acoel Flatworms?

[bs80]

Hi, are these acoel flatworms? I just wanted to be 100% sure. Thanks!

 

[SuaSponte]

Hi, are these acoel flatworms? I just wanted to be 100% sure. Thanks!

It's is hard to tell from the picture, but it certainly looks like acoel flatworms. I had quite a few for a couple of months and then the population disappeared over a week or so. Disclaimer: I am not an expert on flatworms.

 

[andrewkw]

I would agree with the "probably" assessment. At this point you might as well just monitor them for a few weeks and by that time you'll know.

 

[bs80]

Thanks. I've had these around for a month or so already. Are they relatively harmless?

 

[SuaSponte]

Thanks. I've had these around for a month or so already. Are they relatively harmless?

I wouldn't worry too much at this point. From my personal experience, and from what I've read, they are relatively harmless, but like many innocuous pests present in our aquariums, they can become a problem if their population gets completely out of control. I should add that before they "disappeared" from my tank, I would regularly siphon them of the glass with airline tubing while performing my bi-weekly water change.