Answer:
Hold the tail, while I fish for you.
This is rectangular, hollow and has a lid, and where you’ll find it you might wonder, it is just six feet under. What is it?
What is lighter than what it is made of?
Glittering points that downward thrust. Sparkling spears that never rust.
What can be filled with empty hands?
Those with eyes bigger than their stomach will definitely leave the restaurant with one of them. It is named after a house pet as well.