NIGHTIME DISCOVERY

I took a flash light a couple of nights ago to see what's going on inside my
tank after the lights go out, I'd never seen anything other than the
obvious.

Well, I was surprise to finally see the famous PODS for the first time. My
two mandarin dragons perished, I believe due to the lack of this creatures.
Now, I have lot of them running on the sand and live rock, even on the
glass. All it takes is to turn the light on for them to disappear again.

There was a swimming worm type about 1/2 inch long redish in color which I
didn't like to see but, the worst thing I saw was a long (a few inches)
worm, emerging from a hole in a rock from both sides, I assume there is
only one (I hope).

How can I control the population on my tank, who will eat the worms and or
the pods?

My livestock census is:

1 Yellow Tang
1 Blue Tang
2 Stripe Damsels
2 Clownfish

Who will eat the critters, or should I get another predator?

I have corals, so it needs to be 'reef safe'

Thanks in advance,

Ruben

p.s.: I had some sponges growing but I used a brush to remove them from the
rocks.