Dust-like Worm?

[H]-[H]

I saw some really tiny white worms sticking & wriggling on the inside of the glass tank..
On the outside, they look like dust but upon close inspection, they are actually worms.. What are these & are they harmful?
Don't get me wrong but I wipe the inside of the tank & do water change twice a week..

 

[johncl]

They are more than likely Planaria. They are harmless and are usually due to over feeding.

 

[Mazcote Yarquest]

All from Wikipedia:

In 1955, Thompson and James V. McConnell conditioned planarian flatworms by pairing a bright light with an electric shock. After repeating this several times they took away the electric shock, and only exposed them to the bright light. The flatworms would react to the bright light as if they had been shocked. Thompson and McConnell found that if they cut the worm in two, and allowed both worms to regenerate each half would develop the light-shock reaction. In 1962, McConnell repeated the experiment, but instead of cutting the trained flatworms in two he ground them into small pieces and fed them to other flatworms. Incredibly these flatworms learned to associate the bright light with a shock much faster than flatworms who had not been fed trained worms.
This experiment intended to show that memory could perhaps be transferred chemically. The experiment was repeated with mice, fish, and rats, but it always failed to produce the same results. The perceived explanation was that rather than memory being transferred to the other animals, it was the hormones in the ingested ground animals that changed its behaviour.[3] McConnell believed that this was evidence of a chemical basis for memory, which he identified as memory RNA. McConnell's results are now attributed to observer bias.[4] No double-blind experiment has ever reproduced his results.




Here's the link:


http://en.wikipedia.org/wiki/Planarian


I found this rather interesting... I am probably the only one