Answer:
I can 'fly' underwater and have eight arms. What am I?
It's black and every time it speaks it says its name.
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.
What is that which, while it lives, constantly changes its habit, that is buried before it is dead, and whose tomb is valued wherever it is found?
What did the bee say to the flower?
When is it bad luck to see a black cat?