Neeh help with id

I know a picture would help but, i turned the room light on after hours on my tank tonight and i saw these small little red worm like things flosting around some 1/16in other 3/8in long, i guess i woke my royal gramma up and he came out where the light was shining on the tank and ate most of them. any ideas?? 95% of the tank wasn't lit so i'm sure tomorrow more will still be there. I doubt i can get a picture of the item i did net oneof the larger ones but still too small for my camera. did a quick search on google and nothing will do some more searching but your ideas would help?

 

Sounds like bristle worms to me. Luna

 

Bristol worms

 

would they swim around i've seen larger ones and they seem to stay at the bottom by thr gravel or around rocks. also would they be on the diet of a royal gramma??? Thanks guys

 

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