Tiny little creatures

[tqy]

They're probably harmless but I'm curious to find out exactly what they are. Can anyone help to ID these little mischievous creatures?

 

[tqy]

Sorry for the blurry pics, these were the best shots I could get with a magnifying glass

 

[mikeyerushalmi]

Do you have snail in your tank?

 

[tqy]

No, I have a puffer in the tank

 

[mikeyerushalmi]

Add anything to your track lately? Wood/decor from another tank with snails?

 

[tqy]

Well I have fed my puffer snails in the past but I can guarantee you that those are not snails. Was thinking something along that lines of copepods or something like that.

 

[flchamp89]

Google planaria

 

[Fresh2o]

How do they move about?
If they crawl on surfaces and swim in a corkscrew or "fluttering" pattern, then I'd say Ostracods or seed shrimp. Or Gammarus species/amphipods.
If they dart in rapid straight lines, then perhaps copepods.
I've also seen aquatic mites. Just like the terrestrial ones. The crawl super slow.

 

[flchamp89]

Hmm. The bottom picture looks different than top. I think fresh nailed it. You can see the shape in bottom.

 

[tqy]

Haven't seen it swim yet, just crawling on the glass surface?

 

[bullyboy]

Looks like Scuds, they will eat everything especially moss.

I just got some in my grow tank that im gonna gas out this weekend with Co2