Lines in the sand

[monocus]

astria snail?

[bignose]

Can you post a bigger picture.

[pscott99]

Is this any better. I do have 2 astria but I only ever see them on the glass or live rock. I will have to do some night searches.

[Bloodasp]

Some type of worm digging a tunnel maybe.

[lastlight]

Fine sand clings or sticks to some of those tiny worms in the sandbed there might be worms in those 'lines'? Sometime in my tank the flow will unearth them and there is stuff stuck to them.

[toytech]

take a flashlight at night after lights have been out for about an hour and man you will see all sorts of weird stuff come outa nowhere .Try it tonight youll brobably find worms but might be something else .

[Lampshade]

If you have a red LED it works great, nothing goes into hiding, it's creepy stalker mode.