Answer:
I travel in a gaggle.
I am a king who's good at measuring stuff.
I come without being fetched at night, hide away as soon as daylight strikes. Although I may look small, I am much mightier than what you can imagine. What am I?
I don't have eyes, but once I did see. Once I had thoughts, but now I'm white and empty. What am I?
Why is it so easy to weigh fish?
Why was the belt arrested?