Under the microscope...

[MeanGull]

I see dinos, I see diatoms... but what are these worm like creatures? They seem quite restless whipping around. Any ideas?

 

[Jay Hemdal Verified Community Expert]

Probably free living roundworms, but I’m not positive.
Jay

 

[MeanGull]

Hello Jay.

Here are some additional pictures in case they help give a better idea. If they are the free living roundworms (nematodes?), should I worry? I hadn't seen them in any other sample in the past two months.

Thanks.

 

[Nburg's Reef]

Might be nematodes... which are pretty much everywhere on earth

 

[Jay Hemdal Verified Community Expert]

Hello Jay.

Here are some additional pictures in case they help give a better idea. If they are the free living roundworms (nematodes?), should I worry? I hadn't seen them in any other sample in the past two months.

Thanks.

Those do look like nematodes. While some nematodes are parasitic in fish, they are always internal, so if you see any living outside of a fish, they are harmless.

Jay

 

[MeanGull]

Excellent. Thank you both.