Fill in the blank with the correct collective noun.
A school of _______.

A bunch of fish together is called 'A school of fish'.
This is an example of a collective noun, which is the name of a number (or collection) of people, animals, or things taken together and spoken of as one whole.
A group of Tigers - An ambush of tigers
A group of Boys - A blush of boys
A group of cubs - A pack.