Scary Worm, sorry for the poor image.

[foxrain4]

Too afraid to put my hand into and net it out, will it just die on its own?

 

[MacZ]

Move back from the glass so the camera can focus on it or turn off the autofocus.

 

[foxrain4]

Move back from the glass so the camera can focus on it or turn off the autofocus.

It disappeared, yes the worm can move.

 

[tike]

Did it look like this?

 

[foxrain4]

Did it look like this?

Your photo is planaria and is much smaller, I use chili rasboras to kill planarias and detritus worms. The big worm photo I showed is as large as my chili rasbora.

 

[tike]

Photo is so out of focus I can't make it out. Hopefully it makes another appearance and you can get a quick shot of it.

 

[Feohw]

Aquatic moth larvae/caterpillar. They will feed on plants and will make cocoons out of them (which you can see in your pics). This larval stage can last weeks, and some will overwinter. Best to just net it out, or have someone else do it if you can't. They aren't any harm.

 

[foxrain4]

Aquatic moth larvae

After googling, it explains why I cannot find it again, from google, "Larvae can also find shelter from predators by burrowing into the stems of aquatic plants; they chew out a hole, consuming the vegetation and hiding in the hole created.".

I was hoping it would die as it keeps squirming around, I can't believe it is going to transform into a moth instead!