There are many forms of communication in making speeches. If there is technology available, the use of pictures, videos, charts, and graphics, are highly recommendable. This helps give the audience a clear picture of what the speaker is saying. It will enable them to visualize the content of the speech, and further absorb the knowledge that is being sent to them.
Because the fish was dying it represented the grenade without its pin.Therefore you have little time to throw it before it explodes and in this casethe fish was suffocating and had a set time before it died.