Worms

[NHReefAquarium]

The number of things you can find in an salt water aquarium never cease to amaze me. I purchased a cheap usb microscope to view the copepods on the glass. When I looked at the sand up against the glass, I was shocked to see thousands of these tiny red squiggly things. They are slightly smaller than the copepods.
http://imageshack.com/a/img921/6060/iWusAj.gif

[AlSimmons]

Polychaete epitokes most likely.

[mcgyvr]

Yes.. The life even in our little bottles of Ocean is staggering..
Worms, bugs, jellies oh my..