Please help to identify this worm

[elevtok]

Hi guys. I found this worm in my substrate. This is the shortest one. There are a few more really long ones but they move really fast when I was trying to catch them. Any idea what is it?

ImageUploadedByTapatalk1454003763.010756.jpg

ImageUploadedByTapatalk1454004129.637956.jpg

The second photo shows the long one. It's at least 15cm.


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[Urban Aquaria]

Looks like a form of aquatic earthworm... i encountered similar ones in my previous tank that was growing out a HC carpet via DSM (they probably hitchhiked in with the plants).

Here was the thread: http://www.aquaticquotient.com/forum...Method-Journal!

After the tank was flooded, those worms continued living in the soil for months after that. They were harmless though so i left them to help aerate the soil.